viticulturist vs cultivator

viticulturist and cultivator both are nouns.

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

As nouns, cultivator is a hypernym of viticulturist; that is, cultivator is a word with a broader meaning than viticulturist:

viticulturist: a cultivator of grape vine
cultivator: someone concerned with the science or art or business of cultivating the soil

Other hypernyms of viticulturist include agriculturalist, agriculturist, grower, raiser.

viticulturist (noun)	cultivator (noun)
a cultivator of grape vine	a farm implement used to break up the surface of the soil (for aeration and weed control and conservation of moisture)
	someone concerned with the science or art or business of cultivating the soil