convenience vs inconvenient

convenience is a noun but inconvenient is not a noun.

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

convenience (noun)	inconvenient (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)	inconvenient (adjective)
	not suited to your comfort, purpose or needs
	not conveniently timed