Usage: 2 forms in 2 verses
Form Translated As     In Verse(s)
αντίζηλοσ her rival LXX.1Sam.1.6
αντίζηλον as a rival LXX.Lev.18.18

Liddell-Scott-Jones

ἀντίζηλος (antizēlos) a rival G:N-F

ἀντίζηλος-ζηλος, , ,

rival, adversary, [LXX]: as adjective, controversial, in rivalry, παράδοσις[Refs 2nd c.AD+]

LSJ Scripture Refs: LXX.Lev.18.18