syncretism

It provides a more natural explanation of the Colossian syncretism as stemming from local religious impulses that continued to wield a powerful draw on people converted to Christianity from the local Jewish communities and pagan cults. […] The kind of syncretism we find at Colossae was not unique to that city or region.

In this paper a distinction is assumed between full syncretism, which affects whole morphemes, and partial syncretism, which affects only some case allomorphs, and also between syncretism proper and mere loss of a case morpheme.