agriculturalist vs farmer

agriculturalist and farmer both are nouns.

Word	Noun	Adjective	Verb	Adverb
agriculturalist	Yes	No	No	No
farmer	Yes	No	No	No

As nouns, farmer is a hypernym of agriculturalist; that is, farmer is a word with a broader meaning than agriculturalist:

agriculturalist: someone concerned with the science or art or business of cultivating the soil
farmer: a person who operates a farm

Other hypernyms of agriculturalist include granger, husbandman, sodbuster.

agriculturalist (noun)	farmer (noun)
someone concerned with the science or art or business of cultivating the soil	a person who operates a farm