handicapper vs gambler

handicapper and gambler both are nouns.

Word	Noun	Adjective	Verb	Adverb
handicapper	Yes	No	No	No
gambler	Yes	No	No	No

As nouns, gambler is a hypernym of handicapper; that is, gambler is a word with a broader meaning than handicapper:

handicapper: someone who sets the betting odds based on calculations of the outcome of a contest (especially a horse race)
gambler: a person who wagers money on the outcome of games or sporting events

handicapper (noun)	gambler (noun)
someone who sets the betting odds based on calculations of the outcome of a contest (especially a horse race)	a person who wagers money on the outcome of games or sporting events
	someone who risks loss or injury in the hope of gain or excitement