usable vs operational

usable and operational both are adjectives.

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

As adjectives, usable and operational are synonyms defined as:

Other synonyms of usable include functional, operable, useable.

usable (adjective)	operational (adjective)
convenient for use or disposal	(military) of or intended for or involved in military operations
fit or ready for use or service	pertaining to a process or series of actions for achieving a result
capable of being put to use	being in effect or operation
	fit or ready for use or service