hungry
there are apparently only 3 in the english language, angry and hungry being 2 of them, I don't know the third. Although it's part of a riddle too.
Aparantly its part of a 'trick' riddle.....so i don't think there are any more commonly used words ending in 'gry'. There are some uncommon ones I think though. Type "gry" into Google, as lots of sites talk about this riddle with a trick answer.
This is IndieSinger's splendid link from a similar question last week: www.snopes.com/language/puzzlers/gry.asp. If the link won't click you there, you should be able to copy and paste it. If that doesn't work, type it in. It's worth the effort.