diff --git a/libavcodec/pgssubdec.c b/libavcodec/pgssubdec.c
index bcc47f358e..79ae113a7f 100644
--- a/libavcodec/pgssubdec.c
+++ b/libavcodec/pgssubdec.c
@@ -446,7 +446,7 @@ static int decode(AVCodecContext *avctx, void *data, int *data_size,
         case WINDOW_SEGMENT:
             /*
              * Window Segment Structure (No new information provided):
-             *     2 bytes: Unkown,
+             *     2 bytes: Unknown,
              *     2 bytes: X position of subtitle,
              *     2 bytes: Y position of subtitle,
              *     2 bytes: Width of subtitle,
diff --git a/libavcodec/vorbisenc.c b/libavcodec/vorbisenc.c
index 1566f446ce..5082efca76 100644
--- a/libavcodec/vorbisenc.c
+++ b/libavcodec/vorbisenc.c
@@ -41,13 +41,13 @@ typedef struct {
     int nentries;
     uint8_t *lens;
     uint32_t *codewords;
-    int ndimentions;
+    int ndimensions;
     float min;
     float delta;
     int seq_p;
     int lookup;
     int *quantlist;
-    float *dimentions;
+    float *dimensions;
     float *pow2;
 } vorbis_enc_codebook;
 
@@ -149,12 +149,12 @@ static inline int put_codeword(PutBitContext *pb, vorbis_enc_codebook *cb,
     return 0;
 }
 
-static int cb_lookup_vals(int lookup, int dimentions, int entries)
+static int cb_lookup_vals(int lookup, int dimensions, int entries)
 {
     if (lookup == 1)
-        return ff_vorbis_nth_root(entries, dimentions);
+        return ff_vorbis_nth_root(entries, dimensions);
     else if (lookup == 2)
-        return dimentions *entries;
+        return dimensions *entries;
     return 0;
 }
 
@@ -165,28 +165,28 @@ static int ready_codebook(vorbis_enc_codebook *cb)
     ff_vorbis_len2vlc(cb->lens, cb->codewords, cb->nentries);
 
     if (!cb->lookup) {
-        cb->pow2 = cb->dimentions = NULL;
+        cb->pow2 = cb->dimensions = NULL;
     } else {
-        int vals = cb_lookup_vals(cb->lookup, cb->ndimentions, cb->nentries);
-        cb->dimentions = av_malloc(sizeof(float) * cb->nentries * cb->ndimentions);
+        int vals = cb_lookup_vals(cb->lookup, cb->ndimensions, cb->nentries);
+        cb->dimensions = av_malloc(sizeof(float) * cb->nentries * cb->ndimensions);
         cb->pow2 = av_mallocz(sizeof(float) * cb->nentries);
-        if (!cb->dimentions || !cb->pow2)
+        if (!cb->dimensions || !cb->pow2)
             return AVERROR(ENOMEM);
         for (i = 0; i < cb->nentries; i++) {
             float last = 0;
             int j;
             int div = 1;
-            for (j = 0; j < cb->ndimentions; j++) {
+            for (j = 0; j < cb->ndimensions; j++) {
                 int off;
                 if (cb->lookup == 1)
                     off = (i / div) % vals; // lookup type 1
                 else
-                    off = i * cb->ndimentions + j; // lookup type 2
+                    off = i * cb->ndimensions + j; // lookup type 2
 
-                cb->dimentions[i * cb->ndimentions + j] = last + cb->min + cb->quantlist[off] * cb->delta;
+                cb->dimensions[i * cb->ndimensions + j] = last + cb->min + cb->quantlist[off] * cb->delta;
                 if (cb->seq_p)
-                    last = cb->dimentions[i * cb->ndimentions + j];
-                cb->pow2[i] += cb->dimentions[i * cb->ndimentions + j] * cb->dimentions[i * cb->ndimentions + j];
+                    last = cb->dimensions[i * cb->ndimensions + j];
+                cb->pow2[i] += cb->dimensions[i * cb->ndimensions + j] * cb->dimensions[i * cb->ndimensions + j];
                 div *= vals;
             }
             cb->pow2[i] /= 2.;
@@ -211,17 +211,17 @@ static int ready_residue(vorbis_enc_residue *rc, vorbis_enc_context *venc)
         if (j == 8) // zero
             continue;
         cb = &venc->codebooks[rc->books[i][j]];
-        assert(cb->ndimentions >= 2);
+        assert(cb->ndimensions >= 2);
         assert(cb->lookup);
 
         for (j = 0; j < cb->nentries; j++) {
             float a;
             if (!cb->lens[j])
                 continue;
-            a = fabs(cb->dimentions[j * cb->ndimentions]);
+            a = fabs(cb->dimensions[j * cb->ndimensions]);
             if (a > rc->maxes[i][0])
                 rc->maxes[i][0] = a;
-            a = fabs(cb->dimentions[j * cb->ndimentions + 1]);
+            a = fabs(cb->dimensions[j * cb->ndimensions + 1]);
             if (a > rc->maxes[i][1])
                 rc->maxes[i][1] = a;
         }
@@ -257,7 +257,7 @@ static int create_vorbis_context(vorbis_enc_context *venc,
     for (book = 0; book < venc->ncodebooks; book++) {
         vorbis_enc_codebook *cb = &venc->codebooks[book];
         int vals;
-        cb->ndimentions = cvectors[book].dim;
+        cb->ndimensions = cvectors[book].dim;
         cb->nentries    = cvectors[book].real_len;
         cb->min         = cvectors[book].min;
         cb->delta       = cvectors[book].delta;
@@ -272,7 +272,7 @@ static int create_vorbis_context(vorbis_enc_context *venc,
         memset(cb->lens + cvectors[book].len, 0, cb->nentries - cvectors[book].len);
 
         if (cb->lookup) {
-            vals = cb_lookup_vals(cb->lookup, cb->ndimentions, cb->nentries);
+            vals = cb_lookup_vals(cb->lookup, cb->ndimensions, cb->nentries);
             cb->quantlist = av_malloc(sizeof(int) * vals);
             if (!cb->quantlist)
                 return AVERROR(ENOMEM);
@@ -454,7 +454,7 @@ static void put_codebook_header(PutBitContext *pb, vorbis_enc_codebook *cb)
     int ordered = 0;
 
     put_bits(pb, 24, 0x564342); //magic
-    put_bits(pb, 16, cb->ndimentions);
+    put_bits(pb, 16, cb->ndimensions);
     put_bits(pb, 24, cb->nentries);
 
     for (i = 1; i < cb->nentries; i++)
@@ -496,7 +496,7 @@ static void put_codebook_header(PutBitContext *pb, vorbis_enc_codebook *cb)
 
     put_bits(pb, 4, cb->lookup);
     if (cb->lookup) {
-        int tmp  = cb_lookup_vals(cb->lookup, cb->ndimentions, cb->nentries);
+        int tmp  = cb_lookup_vals(cb->lookup, cb->ndimensions, cb->nentries);
         int bits = ilog(cb->quantlist[0]);
 
         for (i = 1; i < tmp; i++)
@@ -848,13 +848,13 @@ static float *put_vector(vorbis_enc_codebook *book, PutBitContext *pb,
 {
     int i, entry = -1;
     float distance = FLT_MAX;
-    assert(book->dimentions);
+    assert(book->dimensions);
     for (i = 0; i < book->nentries; i++) {
-        float * vec = book->dimentions + i * book->ndimentions, d = book->pow2[i];
+        float * vec = book->dimensions + i * book->ndimensions, d = book->pow2[i];
         int j;
         if (!book->lens[i])
             continue;
-        for (j = 0; j < book->ndimentions; j++)
+        for (j = 0; j < book->ndimensions; j++)
             d -= vec[j] * num[j];
         if (distance > d) {
             entry    = i;
@@ -863,7 +863,7 @@ static float *put_vector(vorbis_enc_codebook *book, PutBitContext *pb,
     }
     if (put_codeword(pb, book, entry))
         return NULL;
-    return &book->dimentions[entry * book->ndimentions];
+    return &book->dimensions[entry * book->ndimensions];
 }
 
 static int residue_encode(vorbis_enc_context *venc, vorbis_enc_residue *rc,
@@ -875,7 +875,7 @@ static int residue_encode(vorbis_enc_context *venc, vorbis_enc_residue *rc,
     int partitions = (rc->end - rc->begin) / psize;
     int channels   = (rc->type == 2) ? 1 : real_ch;
     int classes[MAX_CHANNELS][NUM_RESIDUE_PARTITIONS];
-    int classwords = venc->codebooks[rc->classbook].ndimentions;
+    int classwords = venc->codebooks[rc->classbook].ndimensions;
 
     assert(rc->type == 2);
     assert(real_ch == 2);
@@ -916,15 +916,15 @@ static int residue_encode(vorbis_enc_context *venc, vorbis_enc_residue *rc,
                         continue;
 
                     assert(rc->type == 0 || rc->type == 2);
-                    assert(!(psize % book->ndimentions));
+                    assert(!(psize % book->ndimensions));
 
                     if (rc->type == 0) {
-                        for (k = 0; k < psize; k += book->ndimentions) {
+                        for (k = 0; k < psize; k += book->ndimensions) {
                             int l;
                             float *a = put_vector(book, pb, &buf[k]);
                             if (!a)
                                 return AVERROR(EINVAL);
-                            for (l = 0; l < book->ndimentions; l++)
+                            for (l = 0; l < book->ndimensions; l++)
                                 buf[k + l] -= a[l];
                         }
                     } else {
@@ -932,10 +932,10 @@ static int residue_encode(vorbis_enc_context *venc, vorbis_enc_residue *rc,
                         a1 = (s % real_ch) * samples;
                         b1 =  s / real_ch;
                         s  = real_ch * samples;
-                        for (k = 0; k < psize; k += book->ndimentions) {
+                        for (k = 0; k < psize; k += book->ndimensions) {
                             int dim, a2 = a1, b2 = b1;
                             float vec[MAX_CODEBOOK_DIM], *pv = vec;
-                            for (dim = book->ndimentions; dim--; ) {
+                            for (dim = book->ndimensions; dim--; ) {
                                 *pv++ = coeffs[a2 + b2];
                                 if ((a2 += samples) == s) {
                                     a2 = 0;
@@ -945,7 +945,7 @@ static int residue_encode(vorbis_enc_context *venc, vorbis_enc_residue *rc,
                             pv = put_vector(book, pb, vec);
                             if (!pv)
                                 return AVERROR(EINVAL);
-                            for (dim = book->ndimentions; dim--; ) {
+                            for (dim = book->ndimensions; dim--; ) {
                                 coeffs[a1 + b1] -= *pv++;
                                 if ((a1 += samples) == s) {
                                     a1 = 0;
@@ -1099,7 +1099,7 @@ static av_cold int vorbis_encode_close(AVCodecContext *avccontext)
             av_freep(&venc->codebooks[i].lens);
             av_freep(&venc->codebooks[i].codewords);
             av_freep(&venc->codebooks[i].quantlist);
-            av_freep(&venc->codebooks[i].dimentions);
+            av_freep(&venc->codebooks[i].dimensions);
             av_freep(&venc->codebooks[i].pow2);
         }
     av_freep(&venc->codebooks);
diff --git a/libavformat/r3d.c b/libavformat/r3d.c
index cf6d7debbf..f67d10eb80 100644
--- a/libavformat/r3d.c
+++ b/libavformat/r3d.c
@@ -288,7 +288,7 @@ static int r3d_read_reda(AVFormatContext *s, AVPacket *pkt, Atom *atom)
     tmp = avio_rb32(s->pb);
     av_dlog(s, "packet num %d\n", tmp);
 
-    tmp = avio_rb16(s->pb); // unkown
+    tmp = avio_rb16(s->pb); // unknown
     av_dlog(s, "unknown %d\n", tmp);
 
     tmp  = avio_r8(s->pb); // major version
diff --git a/tools/lavfi-showfiltfmts.c b/tools/lavfi-showfiltfmts.c
index a75a3cb49b..d25cf3e138 100644
--- a/tools/lavfi-showfiltfmts.c
+++ b/tools/lavfi-showfiltfmts.c
@@ -50,7 +50,7 @@ int main(int argc, char **argv)
     }
 
     if (avfilter_open(&filter_ctx, filter, NULL) < 0) {
-        fprintf(stderr, "Inpossible to open filter with name '%s'\n",
+        fprintf(stderr, "Impossible to open filter with name '%s'\n",
                 filter_name);
         return 1;
     }
diff --git a/tools/patcheck b/tools/patcheck
index 94e1232e30..b3943c5d7c 100755
--- a/tools/patcheck
+++ b/tools/patcheck
@@ -67,7 +67,7 @@ $EGREP $OPT '^\+ *(const *|)static' $*| $EGREP --color=always '[^=]= *(0|NULL)[^
 cat $TMP
 hiegrep '# *ifdef * (HAVE|CONFIG)_' 'ifdefs that should be #if' $*
 
-hiegrep '\b(awnser|cant|dont|wont|usefull|successfull|occured|teh|alot|wether|skiped|heigth|informations|colums|loosy|loosing|seperate|preceed|upto|paket|posible)\b' 'common typos' $*
+hiegrep '\b(awnser|cant|dont|wont|usefull|successfull|occured|teh|alot|wether|skiped|heigth|informations|colums|loosy|loosing|seperate|preceed|upto|paket|posible|unkown|inpossible|dimention)\b' 'common typos' $*
 
 hiegrep 'av_log\( *NULL' 'Missing context in av_log' $*
 hiegrep '[^sn]printf' 'Please use av_log' $*