tamer vs handler

tamer and handler both are nouns.

Word	Noun	Adjective	Verb	Adverb
tamer	Yes	No	No	No
handler	Yes	No	No	No

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

Other hypernyms of tamer include animal trainer.

tamer (noun)	handler (noun)
an animal trainer who tames wild animals	(sports) someone in charge of training an athlete or a team
	one who trains or exhibits animals
	an agent who handles something or someone