Find one-handed words
Bash (100 89 chars)

for x in a-gq-tvwxz h-puy\'
do grep -iE ^[$x]*$ /usr/share/dict/words|tr '
' \ 
echo
done


Note that 21 chars go to the full path to the words file: if we're allowed to assume that pwd is /usr/share/dict then 16 of those can be saved.

Credit to chron for the shorter regexes.