detritus vs scrap

detritus and scrap both are nouns.

Word	Noun	Adjective	Verb	Adverb
detritus	Yes	No	No	No
scrap	Yes	No	Yes	No

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

Other hypernyms of detritus include rubbish, trash.

detritus (noun)	scrap (noun)
the remains of something that has been destroyed or broken up	the act of fighting; any contest or struggle
loose material (stone fragments and silt etc) that is worn away from rocks	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

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