Usage: 3 forms in 6 verses
Form Translated As     In Verse(s)
πλεονασμών usury LXX.Prov.28.8
πλεονασμώ usury LXX.Lev.25.37
πλεονασμόν by usury LXX.Ezek.18.8LXX.Ezek.18.13
usury LXX.Ezek.18.17LXX.Ezek.22.12

Liddell-Scott-Jones

πλεονασμός (pleonasmos) usury G:N-M

πλεονασμός-ασμός, ,

superabundance, excess, ὑγρότητος, τῶν μερῶν, [πλεονασμόςασμοὶ λαλιᾶς 1st-2nd c.AD: Plutarchus Biographus et Philosophus 2.650e. ">Refs 4th c.BC+]

__b surplus, [Refs 2nd c.AD+]
__2 usury, [LXX]
__3 Rhet. and Grammars, use of redundant words, [Refs 1st c.BC+]
__3.b lengthening of clauses, opposed to μείωσις, [Refs 1st c.BC+]
__4 repetition, [Refs 4th c.BC+]

LSJ Scripture Refs: LXX.Lev.25.37