As it turns out, there actually are more than two words ending in -gry in the English language (though not in the English language). As you can see, two of them are so rare that they aren't even listed in the OED.
Thanks to Sara Greene for passing on this information.
aggry variant spelling of aggri anhungry an obsolete word for hungry that is allowed to stay in Webster's Third New International Dictionary because it shows up in Shakespeare (Coriolanus I:i:209) gry mawgry regarded with displeasure meagry puggry variant spelling of puggree