bird sanctuary vs building

bird sanctuary and building both are nouns.

Word	Noun	Adjective	Verb	Adverb
bird sanctuary	Yes	No	No	No
building	Yes	No	No	No

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

bird sanctuary: a building where birds are kept
building: a structure that has a roof and walls and stands more or less permanently in one place

Other hypernyms of bird sanctuary include edifice.

bird sanctuary (noun)	building (noun)
a building where birds are kept	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