jolly vs fairly

jolly is a noun but fairly is not a noun.

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

As adverbs, jolly and fairly are synonyms defined as:

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

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

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

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

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