connected vs on-line

connected and on-line both are adjectives.

Word	Noun	Adjective	Verb	Adverb
connected	No	Yes	No	No
on-line	No	Yes	No	No

connected (adjective)	on-line (adjective)
joined or linked together	connected to a computer network or accessible by computer
plugged in	on a regular route of a railroad or bus or airline system
being joined in close association	being in progress now
wired together to an alarm system
stored in, controlled by, or in direct communication with a central computer