sleeve vs long sleeve

sleeve and long sleeve both are nouns.

Word	Noun	Adjective	Verb	Adverb
sleeve	Yes	No	No	No
long sleeve	Yes	No	No	No

As nouns, long sleeve is a hyponym of sleeve; that is, long sleeve is a word with a more specific, narrower meaning than sleeve:

sleeve: the part of a garment that is attached at the armhole and that provides a cloth covering for the arm
long sleeve: a sleeve extending from shoulder to wrist

Other hyponyms of sleeve include dolman sleeve, raglan sleeve, shirtsleeve, short sleeve.

sleeve (noun)	long sleeve (noun)
the part of a garment that is attached at the armhole and that provides a cloth covering for the arm	a sleeve extending from shoulder to wrist
small case into which an object fits