network topology vs bus

network topology and bus both are nouns.

Word	Noun	Adjective	Verb	Adverb
network topology	Yes	No	No	No
bus	Yes	No	Yes	No

As nouns, bus is a hyponym of network topology; that is, bus is a word with a more specific, narrower meaning than network topology:

network topology (noun)	bus (noun)
the configuration of a communication network	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

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