Some words that end with -gry are aggry, angry, braggry, conyngry, hungry, iggry, meagry, nangry, podagry and puggry. The definitions for these words can be found if a Google or Bing search is done.
Well, there are only two words that end in "gry" They are, hungry, angry,
Why this is, I do not know. I always thought there were more, but apparently there isn't. It will be kind of hard to rhyme using that. Unless you were to use an other language than English...