calibrate vs caliber

calibrate is not a noun while caliber is a noun.

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

calibrate (noun)	caliber (noun)
	a degree or grade of excellence or worth
	diameter of a tube or gun barrel

calibrate (verb)	caliber (verb)
make fine adjustments or divide into marked intervals for optimal measuring
measure the caliber of
mark (the scale of a measuring instrument) so that it can be read in the desired units