handler vs trainer

handler and trainer both are nouns.

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

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

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

handler (noun)	trainer (noun)
(sports) someone in charge of training an athlete or a team	simulator consisting of a machine on the ground that simulates the conditions of flying a plane
one who trains or exhibits animals	one who trains other persons or animals
an agent who handles something or someone