raiser vs fruit grower

raiser and fruit grower both are nouns.

Word	Noun	Adjective	Verb	Adverb
raiser	Yes	No	No	No
fruit grower	Yes	No	No	No

As nouns, fruit grower is a hyponym of raiser; that is, fruit grower is a word with a more specific, narrower meaning than raiser:

raiser: someone concerned with the science or art or business of cultivating the soil
fruit grower: someone who grows fruit commercially

Other hyponyms of raiser include viticulturist.

raiser (noun)	fruit grower (noun)
someone concerned with the science or art or business of cultivating the soil	someone who grows fruit commercially
a bridge partner who increases the partner's bid