cite vs testify

cite is a noun but testify is not a noun.

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

As verbs, testify is a hypernym of cite; that is, testify is a word with a broader meaning than cite:

Other hypernyms of cite include bear witness, evidence, prove, show.

cite (noun)	testify (noun)
a short note recognizing a source of information or of a quoted passage

cite (verb)	testify (verb)
make reference to	give testimony in a court of law
commend	provide evidence for
repeat a passage from
refer to for illustration or proof
advance evidence for
call in an official matter, such as to attend court
refer to