edifice vs cornerstone

edifice and cornerstone both are nouns.

Word	Noun	Adjective	Verb	Adverb
edifice	Yes	No	No	No
cornerstone	Yes	No	No	No

edifice (noun)	cornerstone (noun)
a structure that has a roof and walls and stands more or less permanently in one place	a stone at the outer corner of two intersecting masonry walls
	a stone in the exterior of a large and important building; usually carved with a date and laid with appropriate ceremonies
	the fundamental assumptions from which something is begun or developed or calculated or explained