Find words containing every vowel
GolfScript, 19 characters
n%{'aeiouy'&amp;,6=},n*

Usage:
golfscript vowels.gs &lt; wordlist.txt

Output:
abstemiously
authoritatively
behaviourally
[...]
uninformatively
unintentionally
unquestionably
unrecognisably

If you also want to output the count at the end you can use
n%{'aeiouy'&amp;,6=},.n*n@,

which is four characters longer.