twirler vs pitcher

twirler and pitcher both are nouns.

Word	Noun	Adjective	Verb	Adverb
twirler	Yes	No	No	No
pitcher	Yes	No	No	No

As nouns, twirler and pitcher are synonyms defined as:

Other synonyms of twirler include hurler.

twirler (noun)	pitcher (noun)
(baseball) the person who does the pitching	the position on a baseball team of the player who throws the ball for a batter to try to hit
someone who twirls a baton	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