1: σημεῖον
(Strong's #4592 — Noun Neuter — semeion — say-mi'-on )

"a sign, token or indication," is translated "token" in 2—Thessalonians 3:17 , of writing of the closing salutations, the Apostle using the pen himself instead of his amanuensis, his autograph attesting the authenticity of his Epistles. See MIRACLE , SIGN.

2: σύσσημον
(Strong's #4953 — Noun Neuter — sussemon — soos'-say-mon )

"a fixed sign or signal, agreed upon with others" (sun, "with"), is used in Mark 14:44 , "a token." In the Sept., Judges 20:38,40; Isaiah 5:26; 49:22; 62:10 .

3: ἔνδειγμα
(Strong's #1730 — Noun Neuter — endeigma — en'-dighe-mah )

"a plain token, a proof" (akin to endeiknumi, "to point out, prove") is used in 2—Thessalonians 1:5 "a manifest token," said of the patient endurance and faith of the persecuted saints at Thessalonica, affording proof to themselves of their new life, and a guarantee of the vindication by God of both Himself and them (see No. 4, Note).

4: ἔνδειξις
(Strong's #1732 — Noun Feminine — endeixis — en'-dike-sis )

"a pointing out, showing forth," is rendered "evident token" in Philippians 1:28 . See DECLARE , B, PROOF. Cp. apodeixis, 1—Corinthians 2:4 .

Philippians 1:28 2—Thessalonians 1:5