free-for-all vs scrap

free-for-all and scrap both are nouns.

Word	Noun	Adjective	Verb	Adverb
free-for-all	Yes	No	No	No
scrap	Yes	No	Yes	No

As nouns, scrap is a hypernym of free-for-all; that is, scrap is a word with a broader meaning than free-for-all:

Other hypernyms of free-for-all include combat, fight, fighting.

free-for-all (noun)	scrap (noun)
a noisy fight in a crowd	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

free-for-all (verb)	scrap (verb)
	make into scrap or refuse
	have a disagreement over something
	dispose of (something useless or old)