backed vs razorback

backed is not a noun while razorback is a noun.

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

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

backed (adjective)	razorback (adjective)
having a back or backing, usually of a specified type	having a sharp narrow back
used of film that is coated on the side opposite the emulsion with a substance to absorb light