foundation stone vs building

foundation stone and building both are nouns.

Word	Noun	Adjective	Verb	Adverb
foundation stone	Yes	No	No	No
building	Yes	No	No	No

foundation stone (noun)	building (noun)
a stone laid at a ceremony to mark the founding of a new building	the act of constructing something
	the commercial activity involved in repairing old structures or constructing new ones
	a structure that has a roof and walls and stands more or less permanently in one place
	the occupants of a building