retract vs retractor

retract is not a noun while retractor is a noun.

Word	Noun	Adjective	Verb	Adverb
retract	No	No	Yes	No
retractor	Yes	No	No	No

retract (noun)	retractor (noun)
	surgical instrument that holds back the edges of a surgical incision

retract (verb)	retractor (verb)
formally reject or disavow a formerly held belief, usually under pressure
pull inward or towards a center
use a surgical instrument to hold open (the edges of a wound or an organ)
pull away from a source of disgust or fear