chaser vs bounty hunter

chaser and bounty hunter both are nouns.

Word	Noun	Adjective	Verb	Adverb
chaser	Yes	No	No	No
bounty hunter	Yes	No	No	No

As nouns, bounty hunter is a hyponym of chaser; that is, bounty hunter is a word with a more specific, narrower meaning than chaser:

chaser: a person who is pursuing and trying to overtake or capture
bounty hunter: someone who pursues fugitives or criminals for whom a reward is offered

chaser (noun)	bounty hunter (noun)
a drink to follow immediately after another drink	a hunter who kills predatory wild animals in order to collect a bounty
a person who is pursuing and trying to overtake or capture	someone who pursues fugitives or criminals for whom a reward is offered