Every month or so, I get an email or message from a friend desperately looking for that ever elusive third word in the English language ending in "-gry".
The other two words, of course, are "angry" and "hungry".
So far as we've been able to determine, this mail is just another case of "things which were deliberately designed to drive people crazy". There is no third word in use in the English language containing that ending.
English majors who've had classes in Old English assure me that five hundred years ago or so, there were in fact a multitude of words ending in gry...but that we no longer use any of them.