somewhat vs jolly

somewhat is not a noun while jolly is a noun.

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

As adverbs, somewhat and jolly are synonyms defined as:

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

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

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

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

somewhat (adverb)	jolly (adverb)
to certain extent or degree	to certain extent or degree
to a small degree or extent