hob vs fay

hob and fay both are nouns.

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

As nouns, fay is a hypernym of hob; that is, fay is a word with a broader meaning than hob:

Other hypernyms of hob include faerie, faery, fairy, sprite.

hob (noun)	fay (noun)
a shelf beside an open fire where something can be kept warm	a small being, human in form, playful and having magical powers
a hard steel edge tool used to cut gears
(folklore) a small grotesque supernatural creature that makes trouble for human beings
(folklore) fairies that are somewhat mischievous

hob (verb)	fay (verb)
cut with a hob