jocund vs gay

jocund is not a noun while gay is a noun.

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

As adjectives, jocund and gay are synonyms defined as:

Other synonyms of jocund include jolly, jovial, merry, mirthful.

jocund (noun)	gay (noun)
	someone who is sexually attracted to persons of the same sex

jocund (adjective)	gay (adjective)
full of or showing high-spirited merriment	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