This paper presents a phonological
study of Igbo language toponyms using Allen’s
(1978) Strong Boundary Condition as a
theoretical base. The basis of the study is to
prove that strong boundary condition for
compounds can be applied to Igbo place names
in order to further endorse its universality. The
paper posits that tonal changes and regressive
assimilation are common features among non-
productive compounds while productive
compounds are insensitive to phonological
changes.