convenience vs convenient

convenience is a noun but convenient is not a noun.

Word	Noun	Adjective	Verb	Adverb
convenience	Yes	No	No	No
convenient	No	Yes	No	No

convenience (noun)	convenient (noun)
a device or control that is very useful for a particular job
a toilet that is available to the public
the quality of being useful and convenient
the state of being suitable or opportune

convenience (adjective)	convenient (adjective)
	suited to your comfort or purpose or needs
	large and roomy (`convenient' is archaic in this sense)