junk vs detritus

junk and detritus both are nouns.

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

As nouns, junk and detritus are synonyms defined as:

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

Other synonyms of junk include debris, dust, rubble.

junk (noun)	detritus (noun)
any of various Chinese boats with a high poop and lugsails	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

junk (verb)	detritus (verb)
dispose of (something useless or old)