inferior vs caliber

inferior and caliber both are nouns.

Word	Noun	Adjective	Verb	Adverb
inferior	Yes	Yes	No	No
caliber	Yes	No	No	No

inferior (noun)	caliber (noun)
a character or symbol set or printed or written beneath or slightly below and to the side of another character	a degree or grade of excellence or worth
one of lesser rank or station or quality	diameter of a tube or gun barrel

inferior (adjective)	caliber (adjective)
written or printed below and to one side of another character
of or characteristic of low rank or importance
of low or inferior quality
having an orbit between the sun and the Earth's orbit
lower than a given reference point
falling short of some prescribed norm