fay vs faerie

fay and faerie both are nouns.

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

As nouns, fay and faerie are synonyms defined as:

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

Other synonyms of fay include faery, fairy, sprite.

fay (noun)	faerie (noun)
a small being, human in form, playful and having magical powers	the enchanted realm of fairies
	a small being, human in form, playful and having magical powers