fairy vs fay

fairy and fay both are nouns.

Word	Noun	Adjective	Verb	Adverb
fairy	Yes	No	No	No
fay	Yes	No	No	No

As nouns, fairy and fay are synonyms defined as:

fairy and fay: a small being, human in form, playful and having magical powers

Other synonyms of fairy include faerie, faery, sprite.

fairy (noun)	fay (noun)
a small being, human in form, playful and having magical powers	a small being, human in form, playful and having magical powers
offensive term for a homosexual man