annul vs set aside

annul and set aside both are verbs.

Word	Noun	Adjective	Verb	Adverb
annul	No	No	Yes	No
set aside	No	No	Yes	No

As verbs, set aside is a hyponym of annul; that is, set aside is a word with a more specific, narrower meaning than annul:

Other hyponyms of annul include break, stet.

annul (verb)	set aside (verb)
cancel officially	make inoperative or stop
declare invalid	give or assign a resource to a particular person or cause
	annul (a legal decision)