cancel vs efface

cancel is a noun but efface is not a noun.

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

As verbs, efface is a hyponym of cancel; that is, efface is a word with a more specific, narrower meaning than cancel:

Other hyponyms of cancel include erase, rub out, score out, wipe off, excise, expunge, scratch, strike.

cancel (noun)	efface (noun)
a notation cancelling a previous sharp or flat

cancel (verb)	efface (verb)
make invalid for use	remove completely from recognition or memory
remove or make invisible	remove by or as if by rubbing or erasing
declare null and void; make ineffective	make inconspicuous
postpone indefinitely or annul something that was scheduled
make up for