reconstruct vs building

reconstruct is not a noun while building is a noun.

Word	Noun	Adjective	Verb	Adverb
reconstruct	No	No	Yes	No
building	Yes	No	No	No

reconstruct (noun)	building (noun)
	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

reconstruct (verb)	building (verb)
do over, as of (part of) a house
cause somebody to adapt or reform socially or politically
reassemble mentally
build again
return to its original or usable and functioning condition