water chute vs sloping trough

water chute and sloping trough both are nouns.

Word	Noun	Adjective	Verb	Adverb
water chute	Yes	No	No	No
sloping trough	Yes	No	No	No

As nouns, sloping trough is a hypernym of water chute; that is, sloping trough is a word with a broader meaning than water chute:

water chute: chute with flowing water down which toboggans and inner tubes and people slide into a pool
sloping trough: sloping channel through which things can descend

Other hypernyms of water chute include chute, slide, slideway.

water chute (noun)	sloping trough (noun)
chute with flowing water down which toboggans and inner tubes and people slide into a pool	sloping channel through which things can descend