right-handed pitcher vs pitcher

right-handed pitcher and pitcher both are nouns.

Word	Noun	Adjective	Verb	Adverb
right-handed pitcher	Yes	No	No	No
pitcher	Yes	No	No	No

As nouns, pitcher is a hypernym of right-handed pitcher; that is, pitcher is a word with a broader meaning than right-handed pitcher:

Other hypernyms of right-handed pitcher include hurler, twirler.

right-handed pitcher (noun)	pitcher (noun)
(baseball) a pitcher who throws with the right hand	the position on a baseball team of the player who throws the ball for a batter to try to hit
	an open vessel with a handle and a spout for pouring
	(baseball) the person who does the pitching
	(botany) a leaf that is modified in such a way as to resemble a pitcher or ewer
	the quantity contained in a pitcher