Preacher - Vine's Expository Dictionary of New Testament Words
Preacher[ 1,,G2783, kerux ]
a herald" (akin to A, No. 2 and B, above), is used
(a) of the "preacher" of the Gospel, 1 Timothy 2:7; 2 Timothy 1:11;
(b) of Noah, as a "preacher" of righteousness, 2 Peter 2:5.
(1) For "a preacher," in Romans 10:14, where the verb kerusso is used, See PREACH, A, No. 2.
(2) Kerux indicates the "preacher" as giving a proclamation; euangelistes points to his message as glad tidings; apostolos suggests his relationship to Him by whom he is sent.