G5286
ὑποπόδιον
footstool
ὑποπόδιον, -ου, τό (ὑπό, πούς), [in LXX: Psa.99:5 110:1, Isa.66:1, La 2:1 (הֲדֹם) * ;] a footstool (= cl. θρᾶνος): Jas.2:3; metaphorically, Mat.5:35, Mrk.12:36 (ὑποκάτω, WH, R, mg.), Luk.20:43, Act.2:35 7:49, Heb.1:13 10:13 (all, except Mt, l.with, from LXX, Psa.110:1, Isa.66:1) (for exx., see Deiss., BS, 223).† (AS)
The KJV translates G5286 in the following manner:
footstool (18x)
Full Thayer's lexicon entry
ὑποπόδιον — hypopódion
ὑποπόδιον, ὑποποδίου, τό (ὑπό and πούς), a footstool (Latinsuppedaneum): Mat 5:35; Act 7:49 (from Isa 66:1); Jas 2:3; τιθέναι τινα ὑποπόδιον τῶν ποδῶν τίνος, to make one the footstool of one's feet, i. e. to subject, reduce under one's power (a metaphorically, taken from the practice of conquerors who placed their feet on the necks of their conquered enemies): Mat 22:44 R G; Mar 12:36 (here WH ὑποκάτω τῶν ποδῶν); Luk 20:43; Act 2:35; Heb 1:13; Heb 10:13, after Psa 109:2. (Lucian, Athen., others; the Sept. for הֲדֹם; (cf. Winer's Grammar, 26).)
7 occurrences
Matthew (1), Luke (1), Acts (2), Hebrews (2), James (1)