pelt vs sluice down

pelt is a noun but sluice down is not a noun.

Word	Noun	Adjective	Verb	Adverb
pelt	Yes	No	Yes	No
sluice down	No	No	Yes	No

As verbs, sluice down is a hyponym of pelt; that is, sluice down is a word with a more specific, narrower meaning than pelt:

Other hyponyms of pelt include sheet, sluice.

pelt (noun)	sluice down (noun)
body covering of a living animal
the dressed hairy coat of a mammal

pelt (verb)	sluice down (verb)
attack and bombard with or as if with missiles	pour as if from a sluice
cast, hurl, or throw repeatedly with some missile
rain heavily