Roman building vs edifice

Roman building and edifice both are nouns.

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

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

Roman building: a building constructed by the ancient Romans
edifice: a structure that has a roof and walls and stands more or less permanently in one place

Other hypernyms of Roman building include antiquity, building.

Roman building (noun)	edifice (noun)
a building constructed by the ancient Romans	a structure that has a roof and walls and stands more or less permanently in one place