operative vs operational

operative is a noun but operational is not a noun.

Word	Noun	Adjective	Verb	Adverb
operative	Yes	Yes	No	No
operational	No	Yes	No	No

operative (noun)	operational (noun)
someone who can be employed as a detective to collect information and assist in criminal investigations
a person secretly employed in espionage for a government

operative (adjective)	operational (adjective)
being in force or having or exerting force	(military) of or intended for or involved in military operations
relating to or requiring or amenable to treatment by surgery especially as opposed to medicine	pertaining to a process or series of actions for achieving a result
(of e.g. a machine) performing or capable of performing	being in effect or operation
effective; producing a desired effect	fit or ready for use or service