cultivator vs farm machine

cultivator and farm machine both are nouns.

Word	Noun	Adjective	Verb	Adverb
cultivator	Yes	No	No	No
farm machine	Yes	No	No	No

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

cultivator: a farm implement used to break up the surface of the soil (for aeration and weed control and conservation of moisture)
farm machine: a machine used in farming

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