local area network vs busbar

local area network and busbar both are nouns.

Word	Noun	Adjective	Verb	Adverb
local area network	Yes	No	No	No
busbar	Yes	No	No	No

local area network (noun)	busbar (noun)
a local computer network for communication between computers; especially a network connecting computers and word processors and other electronic office equipment to create a communication system between offices	an electrical conductor that makes a common connection between several circuits