fairly vs jolly

fairly is not a noun while jolly is a noun.

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

As adverbs, fairly and jolly are synonyms defined as:

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

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

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

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

fairly (adverb)	jolly (adverb)
without favoring one party, in a fair evenhanded manner	to certain extent or degree
to certain extent or degree
in conformity with the rules or laws and without fraud or cheating