invalidate vs avoid

invalidate and avoid both are verbs.

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

As verbs, invalidate and avoid are synonyms defined as:

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

invalidate (verb)	avoid (verb)
take away the legal force of or render ineffective	stay clear from; keep away from; keep out of the way of someone or something
show to be invalid	refrain from certain foods or beverages
make invalid for use	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