What are the only three words in the English language that end in gry?

If these memories are accurate, then perhaps in 1975 a subtle flaw was introduced into an otherwise commonplace word puzzle. Instead of asking for three words that contain "gry," the flawed version asks for three words that end in "gry." Presumably the person who asked the question did not know the answer and, in repeating the question, simply misstated it. Since the flawed version has no good answer, an explosion of searching followed.