avoid vs annul

avoid and annul both are verbs.

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

As verbs, avoid and annul are synonyms defined as:

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

avoid (verb)	annul (verb)
stay clear from; keep away from; keep out of the way of someone or something	cancel officially
refrain from certain foods or beverages	declare invalid
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