negate vs invalidate

negate and invalidate both are verbs.

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

As verbs, invalidate is a hyponym of negate; that is, invalidate is a word with a more specific, narrower meaning than negate:

Other hyponyms of negate include nullify, confute, disprove.

negate (verb)	invalidate (verb)
make ineffective by counterbalancing the effect of	take away the legal force of or render ineffective
prove negative; show to be false	show to be invalid
deny the truth of	make invalid for use
be in contradiction with	declare invalid