somewhere vs location

somewhere and location both are nouns.

Word	Noun	Adjective	Verb	Adverb
somewhere	Yes	No	No	Yes
location	Yes	No	No	No

As nouns, location is a hypernym of somewhere; that is, location is a word with a broader meaning than somewhere:

somewhere (noun)	location (noun)
an indefinite or unknown location	a point or extent in space; a point or extent in space
	a determination of the place where something is
	the act of putting something in a certain place
	a workplace away from a studio at which some or all of a movie may be made

somewhere (adverb)	location (adverb)
in or at or to some place