testify

As a verb testify

is to make a declaration, or give evidence, under oath.

As a noun justification is

a reason, explanation, or excuse which provides convincing, morally acceptable support for behavior or for a belief or occurrence.

As a noun testimonies

is plural of lang=en.

As a verb testify is

to make a declaration, or give evidence, under oath.

As verbs the difference between demonstrate and testify

is that demonstrate is to display the method of using an object while testify is to make a declaration, or give evidence, under oath.

As verbs the difference between testify and vouch

is that testify is to make a declaration, or give evidence, under oath while vouch is to take responsibility for; to express confidence in; to witness; to obtest.

As a noun vouch is

warrant; attestation.

As verbs the difference between testify and test

is that testify is to make a declaration, or give evidence, under oath while test is to refine (gold, silver, etc.) in a test or cupel; to subject to cupellation.

As a noun test is

a cupel or cupelling hearth in which precious metals are melted for trial and refinement.

As verbs the difference between proclaim and testify

is that proclaim is to excitedly, verbosely and candidly describe while testify is to make a declaration, or give evidence, under oath.

Asseverate is a related term of testify.

As verbs the difference between asseverate and testify

is that asseverate is to declare earnestly, seriously, or positively; to affirm while testify is to make a declaration, or give evidence, under oath.

Testify is a synonym of express.

As verbs the difference between express and testify

is that express is (to convey meaning) To convey or communicate; to make known or explicit while testify is to make a declaration, or give evidence, under oath.

As an adjective express

is moving or operating quickly, as a train not making local stops.

As a noun express

is a mode of transportation, often a train, that travels quickly or directly.

As verbs the difference between witnessed and testify

is that witnessed is past tense of witness while testify is to make a declaration, or give evidence, under oath.

Signify is a related term of testify.

As verbs the difference between signify and testify

is that signify is to give (something) a meaning or an importance while testify is to make a declaration, or give evidence, under oath.