1: μαρτύριον
(Strong's #3142 — Noun Neuter — marturion — mar-too'-ree-on )

"a testimony, witness," is almost entirely translated "testimony" in both AV and RV. The only place where both have "witness" is Acts 4:33 . In Acts 7:44; James 5:3 , the RV has "testimony" (AV, "witness").

2—Thessalonians 1:101—Timothy 2:6 Revelation 15:5WITNESS.
2: μαρτυρία
(Strong's #3141 — Noun Feminine — marturia — mar-too-ree'-ah )

"witness, evidence, testimony," is almost always rendered "witness" in the RV (for AV, "testimony" in John 3:32,33; 5:34; 8:17; 21:24 , and always for AV, "record," e.g., 1—John 5:10,11 ), except in Acts 22:18 and in the Apocalypse, where both, with one exception, have "testimony," Acts 1:2 , is objective, the "testimony" or witness given to Him (cp. Acts 1:2,9; as to those who will bear it, see Revelation 12:17 , RV). The statement "the testimony of Jesus is the spirit of prophecy," is to be understood in the light, e.g., of the "testimony" concerning Christ and Israel in the Psalms, which will be used by the godly Jewish remnant in the coming time of "Jacob's Trouble." All such "testimony" centers in and points to Christ. See WITNESS.