connected vs connection

connected is not a noun while connection is a noun.

Word	Noun	Adjective	Verb	Adverb
connected	No	Yes	No	No
connection	Yes	No	No	No

connected (noun)	connection (noun)
	the act of bringing two things into contact (especially for communication)
	shifting from one form of transportation to another
	an instrumentality that connects
	the process of bringing ideas or events together in memory or imagination
	a supplier (especially of narcotics)
	(usually plural) a person who is influential and to whom you are connected in some way (as by family or friendship)
	a relation between things or events (as in the case of one causing the other or sharing features with it)
	a connecting shape
	the state of being connected

connected (adjective)	connection (adjective)
joined or linked together
plugged in
being joined in close association
wired together to an alarm system
stored in, controlled by, or in direct communication with a central computer