Sword - Vine's Expository Dictionary of New Testament Words
Sword[ 1,,G3162, machaira ]
a short sword or dagger" (distinct from No. 2), e.g., Matthew 26:47, Matthew 26:51-Matthew 26:52 and parallel passages; Luke 21:24; Luke 22:38, possibly "a knife" (Field, Notes on the Translation of the NT); Hebrews 4:12 (See TWO-EDGED); metaphorically and by metonymy,
(a) for ordinary violence, or dissensions, that destroy peace, Matthew 10:34;
(b) as the instrument of a magistrate or judge, e.g., Romans 13:4;
(c) of the Word of God, "the sword of the Spirit," probing the conscience, subduing the impulses to sin, Ephesians 6:17.
[ 2,,G4501, rhomphaia ]
a word of somewhat doubtful origin, denoted "a Thracian weapon of large size," whether a sword or spear is not certain, but usually longer than No. 1; it occurs
(a) literally in Revelation 6:8;
(b) metaphorically, as the instrument of anguish, Luke 2:35; of judgment, Revelation 1:16; Revelation 2:12, Revelation 2:16; Revelation 19:15, Revelation 19:21, probably figurative of the Lord's judicial utterances.