in-tray vs in-basket

in-tray and in-basket both are nouns.

Word	Noun	Adjective	Verb	Adverb
in-tray	Yes	No	No	No
in-basket	Yes	No	No	No

As nouns, in-tray and in-basket are synonyms defined as:

in-tray and in-basket: a wood or metal receptacle placed on your desk to hold your incoming material

in-tray (noun)	in-basket (noun)
a wood or metal receptacle placed on your desk to hold your incoming material	a wood or metal receptacle placed on your desk to hold your incoming material