rough-and-tumble vs scrap

rough-and-tumble and scrap both are nouns.

Word	Noun	Adjective	Verb	Adverb
rough-and-tumble	Yes	Yes	No	No
scrap	Yes	No	Yes	No

As nouns, scrap is a hypernym of rough-and-tumble; that is, scrap is a word with a broader meaning than rough-and-tumble:

Other hypernyms of rough-and-tumble include combat, fight, fighting.

rough-and-tumble (noun)	scrap (noun)
disorderly fighting	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

rough-and-tumble (adjective)	scrap (adjective)
characterized by disorderly action and disregard for rules

rough-and-tumble (verb)	scrap (verb)
	make into scrap or refuse
	have a disagreement over something
	dispose of (something useless or old)