earring

As nouns the difference between earring and heteroclitic

is that earring is a piece of jewelry worn on the ear while heteroclitic is a noun.

As an adjective heteroclitic is

(linguistics) in linguistics, particularly indo-european studies, signifying a stem which alternates between more than one form when declined for grammatical case examples of heteroclitic noun stems in proto-indo-european include *wod-r/n-' "water" (nominoaccusative '''*wódr'''; genitive '''*udnés'''; locative '''*udén''') and '''*yék^w-r/n-''' "liver" (nominoaccusative '''*yék^wr''', genitive ' *ik^wnés ) in proto-indo-european, heteroclitic stems tend to be noun stems with grammatically inanimate gender.

As nouns the difference between earring and eardrop

is that earring is a piece of jewelry worn on the ear while eardrop is medicine to be administered to the ear.