vary vs contradict

vary and contradict both are verbs.

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

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

Other hyponyms of vary include aberrate, aberrate, belie, negate.

vary (verb)	contradict (verb)
become different in some particular way, without permanently losing one's or its former characteristics or essence	prove negative; show to be false
make something more diverse and varied	deny the truth of
be at variance with; be out of line with	be resistant to
be subject to change in accordance with a variable	be in contradiction with