grower vs fruit grower

grower and fruit grower both are nouns.

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

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

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

Other hyponyms of grower include viticulturist.

grower (noun)	fruit grower (noun)
someone concerned with the science or art or business of cultivating the soil	someone who grows fruit commercially