razor-backed vs razorback

razor-backed is not a noun while razorback is a noun.

Word	Noun	Adjective	Verb	Adverb
razor-backed	No	Yes	No	No
razorback	Yes	Yes	No	No

As adjectives, razor-backed and razorback are synonyms defined as:

razor-backed (noun)	razorback (noun)
	a mongrel hog with a thin body and long legs and a ridged back; a wild or semi-wild descendant of improved breeds; found chiefly in the southeastern United States
	any of several baleen whales of the family Balaenopteridae having longitudinal grooves on the throat and a small pointed dorsal fin

razor-backed (adjective)	razorback (adjective)
having a sharp narrow back	having a sharp narrow back