A — 1: εἰρήνη
(Strong's #1515 — Noun Feminine — eirene — i-rah'-nay )

"occurs in each of the books of the NT, save 1John and save in Acts 7:26 ['(at) one again'] it is translated "peace" in the RV. It describes (a) harmonious relationships between men, Matthew 10:34; Romans 14:19; (b) between nations, Luke 14:32; Acts 12:20; Revelation 6:4; (c) friendliness, Acts 15:33; 1—Corinthians 16:11; Hebrews 11:31; (d) freedom from molestation, Luke 11:21; 19:42; Acts 9:31 (RV, 'peace,' AV, 'rest'); 16:36; (e) order, in the State, Acts 24:2 (RV, 'peace,' AV, 'quietness'); in the churches, 1—Corinthians 14:33; (f) the harmonized relationships between God and man, accomplished through the gospel, Acts 10:36; Ephesians 2:17; (g) the sense of rest and contentment consequent thereon, Matthew 10:13; Mark 5:34; Luke 1:79; 2:29; John 14:27; Romans 1:7; 3:17; 8:6; in certain passages this idea is not distinguishable from the last, Romans 5:1 ." * [* From Notes on Thessalonians by Hogg and Vine, p. 154.]

Romans 15:3316:20Philippians 4:91—Thessalonians 5:23Hebrews 13:201—Corinthians 14:332—Corinthians 13:11Joshua 8:31Ruth 2:12Nehemiah 6:15Isaiah 42:191—Thessalonians 5:23 Genesis 26:3141:16Luke 7:508:482—Thessalonians 3:16Acts 7:26
B — 1: εἰρηνεύω
(Strong's #1514 — Verb — eireneuo — i-rane-yoo'-o )

primarily, "to bring to peace, reconcile," denotes in the NT, "to keep peace or to be at peace:" in Mark 9:50 , RV, the Lord bids the disciples "be at peace" with one another, gently rebuking their ambitious desires; in Romans 12:18 (RV, "be at peace," AV, "live peaceably") the limitation "if it be possible, as much as in you lieth," seems due to the phrase "with all men," but is not intended to excuse any evasion of the obligation imposed by the command; in 2—Corinthians 13:11 it is rendered "live in peace," a general exhortation to believers; in 1—Thessalonians 5:13 , "be at peace (among yourselves)."

B — 2: εἰρηνοποιέω
(Strong's #1517 — Verb — eirenopoieo — i-ray-nop-oy-eh'-o )

"to make peace" (eirene, and poieo, "to make"), is used in Colossians 1:20 . In the Sept., Proverbs 10:10 .

C — 1: εἰρηνικός
(Strong's #1516 — Adjective — eirenikos — i-ray-nee-kos' )

akin to A, denotes "peaceful." It is used (a) of the fruit of righteousness, Hebrews 12:11 , "peaceable" (or "peaceful") because it is produced in communion with God the Father, through His chastening; (b) of "the wisdom that is from above," James 3:17 .

1—Timothy 2:2