brussels sprouts vs brussels sprout

brussels sprouts and brussels sprout both are nouns.

Word	Noun	Adjective	Verb	Adverb
brussels sprouts	Yes	No	No	No
brussels sprout	Yes	No	No	No

brussels sprouts (noun)	brussels sprout (noun)
the small edible cabbage-like buds growing along a stalk of the brussels sprout plant	plant grown for its stout stalks of edible small green heads resembling diminutive cabbages