efface vs effacement

efface is not a noun while effacement is a noun.

Word	Noun	Adjective	Verb	Adverb
efface	No	No	Yes	No
effacement	Yes	No	No	No

efface (noun)	effacement (noun)
	withdrawing into the background; making yourself inconspicuous
	shortening of the uterine cervix and thinning of its walls as it is dilated during labor

efface (verb)	effacement (verb)
remove completely from recognition or memory
remove by or as if by rubbing or erasing
make inconspicuous