testify vs manifest

testify is not a noun while manifest is a noun.

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

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

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

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

testify (noun)	manifest (noun)
	a customs document listing the contents put on a ship or plane

testify (adjective)	manifest (adjective)
	clearly revealed to the mind or the senses or judgment

testify (verb)	manifest (verb)
give testimony in a court of law	reveal its presence or make an appearance
provide evidence for	provide evidence for; stand as proof of; show by one's behavior, attitude, or external attributes
	record in a ship's manifest