bus vs roof

bus and roof both are nouns.

Word	Noun	Adjective	Verb	Adverb
bus	Yes	No	Yes	No
roof	Yes	No	Yes	No

bus (noun)	roof (noun)
a vehicle carrying many passengers; used for public transport	a protective covering that covers or forms the top of a building
a car that is old and unreliable	protective covering on top of a motor vehicle
an electrical conductor that makes a common connection between several circuits	an upper limit on what is allowed
the topology of a network whose components are connected by a busbar	the inner top surface of a covered area or hollow space

bus (verb)	roof (verb)
remove used dishes from the table in restaurants	provide a building with a roof; cover a building with a roof
ride in a bus
send or move around by bus