ice vs ice cube

ice and ice cube both are nouns.

Word	Noun	Adjective	Verb	Adverb
ice	Yes	No	Yes	No
ice cube	Yes	No	No	No

ice (noun)	ice cube (noun)
a rink with a floor of ice for ice hockey or ice skating	a small cube of artificial ice; used for cooling drinks
an amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant
a frozen dessert with fruit flavoring (especially one containing no milk)
a flavored sugar topping used to coat and decorate cakes
the frozen part of a body of water
diamonds
water frozen in the solid state