cancel vs set off

cancel is a noun but set off is not a noun.

Word	Noun	Adjective	Verb	Adverb
cancel	Yes	No	Yes	No
set off	No	No	Yes	No

As verbs, cancel and set off are synonyms defined as:

Other synonyms of cancel include offset.

cancel (noun)	set off (noun)
a notation cancelling a previous sharp or flat

cancel (verb)	set off (verb)
make invalid for use	cause to burst with a violent release of energy
remove or make invisible	set in motion or cause to begin
declare null and void; make ineffective	direct attention to, as if by means of contrast
postpone indefinitely or annul something that was scheduled	provoke or stir up
make up for	put in motion or move to act
	depart for someplace
	make up for