passably vs jolly

passably is not a noun while jolly is a noun.

Word	Noun	Adjective	Verb	Adverb
passably	No	No	No	Yes
jolly	Yes	Yes	Yes	Yes

As adverbs, passably and jolly are synonyms defined as:

Other synonyms of passably include fairly, middling, moderately, pretty, reasonably, somewhat.

passably (noun)	jolly (noun)
	a yawl used by a ship's sailors for general work
	a happy party

passably (adjective)	jolly (adjective)
	full of or showing high-spirited merriment

passably (verb)	jolly (verb)
	be silly or tease one another

passably (adverb)	jolly (adverb)
to certain extent or degree	to certain extent or degree