annul vs avoid

annul and avoid both are verbs.

Word	Noun	Adjective	Verb	Adverb
annul	No	No	Yes	No
avoid	No	No	Yes	No

As verbs, annul and avoid are synonyms defined as:

Other synonyms of annul include invalidate, nullify, quash, void.

annul (verb)	avoid (verb)
cancel officially	stay clear from; keep away from; keep out of the way of someone or something
declare invalid	refrain from certain foods or beverages
	declare invalid
	prevent the occurrence of; prevent from happening; to protect from or to keep away anything undesirable; to ward off
	refrain from doing something