testify vs evidence

testify is not a noun while evidence is a noun.

Word	Noun	Adjective	Verb	Adverb
testify	No	No	Yes	No
evidence	Yes	No	Yes	No

As verbs, testify and evidence are synonyms defined as:

Other synonyms of testify include bear witness, prove, show.

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

testify: provide evidence for
evidence: provide evidence for; stand as proof of; show by one's behavior, attitude, or external attributes

Other hyponyms of testify include attest, certify, demonstrate, manifest, presume, abduce, adduce, cite.

testify (noun)	evidence (noun)
	your basis for belief or disbelief; knowledge on which to base belief
	(law) all the means by which any alleged matter of fact whose truth is investigated at judicial trial is established or disproved
	an indication that makes something evident

testify (verb)	evidence (verb)
give testimony in a court of law	provide evidence for; stand as proof of; show by one's behavior, attitude, or external attributes
provide evidence for	provide evidence for
	give evidence