sleeve vs shirtsleeve

sleeve and shirtsleeve both are nouns.

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

As nouns, shirtsleeve is a hyponym of sleeve; that is, shirtsleeve 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
shirtsleeve: the sleeve of a shirt

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

sleeve (noun)	shirtsleeve (noun)
the part of a garment that is attached at the armhole and that provides a cloth covering for the arm	the sleeve of a shirt
small case into which an object fits