The spelling list seems to miss the words "dystopia" and "dystopian". These mean the opposite of "utopia" and "utopian", respectively. I caught this when I checked a document with the latter word.

Notes:
Mon Apr 28 19:06:48 EDT 2008 geoff
    the dictionary isn't guaranteed to include all words,
    just some common ones.


Reference: /n/sources/patch/sorry/dystopia-in-spelling-list
Date: Sun Apr 27 16:09:19 CES 2008
Signed-off-by: pietro10@mac.com
Reviewed-by: geoff

--- /lib/words	Sun Apr 27 16:08:30 2008
+++ /lib/words	Sun Apr 27 16:08:26 2008
@@ -8552,6 +8552,8 @@
 dyspeptic
 dysplasia
 dysprosium
+dystopia
+dystopian
 dystrophy
 each
 Eagan