somewhat vs fairly

somewhat and fairly both are adverbs.

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

As adverbs, somewhat and fairly are synonyms defined as:

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

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