ὁρκωμοσία, -ας, ἡ (< ὅρκος, ὄμνυμι; by metapl. for τὰ ὁρκωμόσια, asseverations on oath; see MM, xviii), [in LXX: Eze.17:18-19 (עָלָה) 1Es 9:93* ;] affirmation on oath, an oath: Refs Heb.7:20-21, 28.† (AS)
Thayer:
1) affirmation made on oath, the taking of an oath, an oath
ὁρκωμοσία
horkōmosia
hor-ko-mos-ee'-ah
From a compound of G3727 and a derivative of G3660; asseverationonoath
ὀμνύω
omnuō
om-noo'-o
A prolonged form of a primary but obsolete word, ὄμω omō , for which another prolonged form ( ὀμόω omoō om-o'-o ) is used in certain tenses. To swear, that is, take (or declareon) oath
KJV Usage: swear.
G4945 συνωμοσίασυνωμοσία
sunōmosia
soon-o-mos-ee'-ah
From a compound of G4862 and G3660; a swearingtogether, that is, (by implication) a plot