nullify vs contradict

nullify and contradict both are verbs.

Word	Noun	Adjective	Verb	Adverb
nullify	No	No	Yes	No
contradict	No	No	Yes	No

As verbs, contradict is a hypernym of nullify; that is, contradict is a word with a broader meaning than nullify:

Other hypernyms of nullify include negate.

nullify (verb)	contradict (verb)
make ineffective by counterbalancing the effect of	prove negative; show to be false
show to be invalid	deny the truth of
declare invalid	be resistant to
	be in contradiction with