crack shot vs sharpshooter

crack shot and sharpshooter both are nouns.

Word	Noun	Adjective	Verb	Adverb
crack shot	Yes	No	No	No
sharpshooter	Yes	No	No	No

As nouns, crack shot and sharpshooter are synonyms defined as:

Other synonyms of crack shot include marksman.

crack shot (noun)	sharpshooter (noun)
someone skilled in shooting	a fast schooner once used by New England fisherman for illegal fishing in Canadian waters
	someone skilled in shooting
	an athlete noted for accurate aim