diff --git a/BUILD-SYSTEM b/BUILD-SYSTEM
index 5dcbda7c..c0cb2ca3 100644
--- a/BUILD-SYSTEM
+++ b/BUILD-SYSTEM
@@ -13,7 +13,7 @@ build system is more complicated than a "normal" deutex build would
 otherwise be.
 
 A top-level +Makefile+ controls the build system and executes the
-appopriate commands to generate the output WAD files.  Various
+appropriate commands to generate the output WAD files.  Various
 intermediate files are generated in the process by scripts.  The
 following diagram illustrates the process:
 
@@ -232,7 +232,7 @@ directories to generate the WAD:
  * +levels+ : The levels.  Files are named eg. map01.wad or e1m1.wad
    for Doom II and Doom I levels, with FreeDM levels named eg.
    dm01.wad.
- * +lumps+ : Miscellaenous lumps.
+ * +lumps+ : Miscellaneous lumps.
  * +musics+ : Music files, in MUS or MIDI format.
  * +patches+ : Patch graphics that are used to compose wall textures.
  * +sounds+ : Sound effects, in WAV format.
@@ -240,7 +240,7 @@ directories to generate the WAD:
    weapons, decorations, etc.)
  * +textures+ : Texture definitions.
 
-=== Idiosynchrosies
+=== Idiosyncrasies
 
 deutex is an old tool and has various quirks that must be worked
 around.  Some of them are listed here.
diff --git a/README b/README
index 793c32f9..3c2b8655 100644
--- a/README
+++ b/README
@@ -96,9 +96,9 @@ It is sensible to also heed the following guidelines:
     like a mess).  They cannot use the Doom font.
   * Textures should be the same dimensions as the originals.  They
     should be similar but not identical (to avoid IP infringement) --
-    in fact, they shuold be as different as possible while keeping to
+    in fact, they should be as different as possible while keeping to
     the general theme of the texture.  As mentioned above, try to make
-    a concious effort to make the textures visibly different from the
+    a conscious effort to make the textures visibly different from the
     originals.  Critically, the textures should tile in the same way as
     the originals.
   * Some textures contain the letters UAC or references to UAC; this is
@@ -147,7 +147,7 @@ example, explaining what part of the map was broken).  See commit
 49dc6ca861d4b85ca16b219941ecb86d3e172ac1 for an example.  Sign your
 comments with +git commit -s+, these leaves a trail of whose hands a
 commit went through and could be useful for some purposes; git alone can
-give an indication of up to two people, however the AUTHOR/COMMITER
+give an indication of up to two people, however the AUTHOR/COMMITTER
 fields are not quite reliable or flexible enough for the same
 information.