office building vs edifice

office building and edifice both are nouns.

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

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

office building: a building containing offices where work is done
edifice: a structure that has a roof and walls and stands more or less permanently in one place

Other hypernyms of office building include building.

office building (noun)	edifice (noun)
a building containing offices where work is done	a structure that has a roof and walls and stands more or less permanently in one place