Usage: 2 forms in 2 verses
Form Translated As     In Verse(s)
οικοπέδων their areas LXX.Ps.109.10
οικοπέδω area LXX.Ps.102.6

Liddell-Scott-Jones

οἰκόπεδον (oikopedon) an area G:N-N

οἰκόπεδον-ον, τό,

site of a house, place on which a house is or has been built, [Refs 5th c.BC+]; building-site, [Refs 1st c.AD+]; site of a city, πόλεως [Refs 2nd c.BC+]

__2 the house itself, building, [Refs 5th c.BC+]