computing machine vs bus

computing machine and bus both are nouns.

Word	Noun	Adjective	Verb	Adverb
computing machine	Yes	No	No	No
bus	Yes	No	Yes	No

computing machine (noun)	bus (noun)
a machine for performing calculations automatically	a vehicle carrying many passengers; used for public transport
	a car that is old and unreliable
	an electrical conductor that makes a common connection between several circuits
	the topology of a network whose components are connected by a busbar

computing machine (verb)	bus (verb)
	remove used dishes from the table in restaurants
	ride in a bus
	send or move around by bus