grower vs viticulturist

grower and viticulturist both are nouns.

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

As nouns, viticulturist is a hyponym of grower; that is, viticulturist 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
viticulturist: a cultivator of grape vine

Other hyponyms of grower include fruit grower.

grower (noun)	viticulturist (noun)
someone concerned with the science or art or business of cultivating the soil	a cultivator of grape vine