Usage: 6 forms in 34 verses
Form Translated As     In Verse(s)
γιγάντων giants LXX.Josh.12.4 • LXX.2Sam.21.18 • LXX.2Sam.21.22 • LXX.1Chr.11.15 • LXX.1Chr.14.9 • LXX.1Chr.14.13 • LXX.1Chr.20.4 • LXX.1Chr.20.6 • LXX.Ezek.32.27
of giants LXX.Deut.1.28 • LXX.Josh.13.12 • LXX.Prov.21.16 • LXX.Ezek.32.12 • LXX.Ezek.39.18
γίγασ a giant LXX.Gen.10.8 • LXX.Gen.10.9 • LXX.Gen.10.9 • LXX.1Chr.1.10 • LXX.Ps.19.5 • LXX.Ps.33.16
γίγαντοσ a giant LXX.Isa.49.24
γίγαντεσ giants LXX.Gen.6.4 • LXX.Gen.6.4 • LXX.1Chr.20.8 • LXX.Job.26.5 • LXX.Isa.13.3 • LXX.Isa.14.9 • LXX.Ezek.32.21 • LXX.Ezek.32.27
γίγαντασ giants LXX.Gen.14.5 • LXX.Num.13.33
γίγαντα a giant LXX.Isa.49.25
giant LXX.Isa.3.2 • LXX.Ezek.39.20

Liddell-Scott-Jones

γίγας (gigas) a giant G:N-M

γίγας [ῐ], αντος, ὁ,

mostly in plural, “Giants”, ὑπέρθυμοι [Refs 8th c.BC+]; of Capaneus, [Refs 4th c.BC+]

__II as adjective, mighty [Refs 5th c.AD+]