sloping trough vs slideway

sloping trough and slideway both are nouns.

Word	Noun	Adjective	Verb	Adverb
sloping trough	Yes	No	No	No
slideway	Yes	No	No	No

As nouns, sloping trough and slideway are synonyms defined as:

sloping trough and slideway: sloping channel through which things can descend

Other synonyms of sloping trough include chute, slide.

sloping trough (noun)	slideway (noun)
sloping channel through which things can descend	sloping channel through which things can descend