A — 1: βασιλεύς
(Strong's #935 — Noun Masculine — basileus — bas-il-yooce' )

"a king" (cp. Eng., "Basil"), e.g., Matthew 1:6 , is used of the Roman emperor in 1—Peter 2:13,17 (a command of general application); this reference to the emperor is illustrated frequently in the Koine (see Preface to this volume); of Herod the Tetrarch (used by courtesy), Matthew 14:9; of Christ, as the "King" of the Jews, e.g., Matt, 2:2; 27:11,29,37; as the "King" of Israel, Mark 15:32; John 1:49; 12:13; as "King of kings," Revelation 17:14; 19:16; as "the King" in judging nations and men at the establishment of the millennial kingdom, Matthew 25:34,40; of God, "the great King," Matthew 5:35; "the King eternal, incorruptible, invisible," 1—Timothy 1:17; "King of kings," 1—Timothy 6:15 , see Note (2) below; "King of the ages," Revelation 15:3 , RV (AV, "saints"). Christ's "kingship" was predicted in the OT, e.g., Psalm 2:6 , and in the NT, e.g., Luke 1:32,33; He came as such, e.g., Matthew 2:2; John 18:37; was rejected and died as such, Luke 19:14; Matthew 27:37; is now a "King" Priest, after the order of Melchizedek, Hebrews 5:6; 7:1,17; and will reign for ever and ever, Revelation 11:15 .

Revelation 1:65:10Exodus 19:61—Peter 2:5,91—Timothy 6:15REIGN
B — 1: βασίλειος
(Strong's #934 — Adjective — basileios — bas-il'-i-os )

denoting "royal," as in 1—Peter 2:9 , is used in the plural, of the courts or palaces of kings, Luke 7:25 , "kings' courts;" a possible meaning is "among royal courtiers or persons."

B — 2: βασιλικός
(Strong's #937 — Adjective — basilikos — bas-il-ee-kos' )

"royal, belonging to a king," is used in Acts 12:20 with "country" understood, "their country was fed from the king's," lit., "the royal (country)." See NOBLEMAN , ROYAL.