farm building vs edifice

farm building and edifice both are nouns.

Word	Noun	Adjective	Verb	Adverb
farm building	Yes	No	No	No
edifice	Yes	No	No	No

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

farm building: a building on a farm
edifice: a structure that has a roof and walls and stands more or less permanently in one place

Other hypernyms of farm building include building.

farm building (noun)	edifice (noun)
a building on a farm	a structure that has a roof and walls and stands more or less permanently in one place