gayness vs gay

gayness and gay both are nouns.

Word	Noun	Adjective	Verb	Adverb
gayness	Yes	No	No	No
gay	Yes	Yes	No	No

gayness (noun)	gay (noun)
a sexual attraction to (or sexual relations with) persons of the same sex	someone who is sexually attracted to persons of the same sex

gayness (adjective)	gay (adjective)
	bright and pleasant; promoting a feeling of cheer
	brightly colored and showy
	homosexual or arousing homosexual desires
	given to social pleasures often including dissipation
	offering fun and gaiety
	full of or showing high-spirited merriment