plainsman vs inhabitant

plainsman and inhabitant both are nouns.

Word	Noun	Adjective	Verb	Adverb
plainsman	Yes	No	No	No
inhabitant	Yes	No	No	No

As nouns, inhabitant is a hypernym of plainsman; that is, inhabitant is a word with a broader meaning than plainsman:

plainsman: an inhabitant of a plains region (especially the Great Plains of North America)
inhabitant: a person who inhabits a particular place

Other hypernyms of plainsman include denizen, dweller, habitant, indweller.

plainsman (noun)	inhabitant (noun)
an inhabitant of a plains region (especially the Great Plains of North America)	a person who inhabits a particular place