debris vs detritus

debris and detritus both are nouns.

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

As nouns, debris and detritus are synonyms defined as:

debris and detritus: the remains of something that has been destroyed or broken up

Other synonyms of debris include dust, junk, rubble.

debris (noun)	detritus (noun)
the remains of something that has been destroyed or broken up	the remains of something that has been destroyed or broken up
	loose material (stone fragments and silt etc) that is worn away from rocks