building vs roofing

building and roofing both are nouns.

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

building (noun)	roofing (noun)
the act of constructing something	the craft of a roofer
the commercial activity involved in repairing old structures or constructing new ones	material used to construct a roof
a structure that has a roof and walls and stands more or less permanently in one place
the occupants of a building