knife fight vs scrap

knife fight and scrap both are nouns.

Word	Noun	Adjective	Verb	Adverb
knife fight	Yes	No	No	No
scrap	Yes	No	Yes	No

As nouns, scrap is a hypernym of knife fight; that is, scrap is a word with a broader meaning than knife fight:

Other hypernyms of knife fight include combat, fight, fighting.

knife fight (noun)	scrap (noun)
fighting with knives	the act of fighting; any contest or struggle
	a small piece of something that is left over after the rest has been used
	a small fragment of something broken off from the whole
	worthless material that is to be disposed of

knife fight (verb)	scrap (verb)
	make into scrap or refuse
	have a disagreement over something
	dispose of (something useless or old)