collimator vs collimate

collimator is a noun but collimate is not a noun.

Word	Noun	Adjective	Verb	Adverb
collimator	Yes	No	No	No
collimate	No	No	Yes	No

collimator (noun)	collimate (noun)
optical device consisting of a tube containing a convex achromatic lens at one end and a slit at the other with the slit at the focus of the lens; light rays leave the slit as a parallel beam
a small telescope attached to a large telescope to use in setting the line of the larger one

collimator (verb)	collimate (verb)
	adjust the line of sight of (an optical instrument)
	make or place parallel to something