Usage: 3 forms in 4 verses
Form Translated As     In Verse(s)
ασεβήματα their acts of impiety LXX.Deut.9.27
ασεβήματά my acts of impiety LXX.Lam.1.14
your acts of impiety LXX.Lam.4.22
ασέβημά it is an act of impiety LXX.Lev.18.17

Liddell-Scott-Jones

ἀσέβημα (asebēma) an act of impiety G:N-N

ἀσέβημα-ημα, ατος, τό,

impious or profane act, sacrilege, opposed to ἀδίκημα, [Refs 5th c.BC+]