baseball coach vs handler

baseball coach and handler both are nouns.

Word	Noun	Adjective	Verb	Adverb
baseball coach	Yes	No	No	No
handler	Yes	No	No	No

As nouns, handler is a hypernym of baseball coach; that is, handler is a word with a broader meaning than baseball coach:

Other hypernyms of baseball coach include coach, manager.

baseball coach (noun)	handler (noun)
a coach of baseball players	(sports) someone in charge of training an athlete or a team
	one who trains or exhibits animals
	an agent who handles something or someone