Superconvergent is a related term of superconvergence.
In mathematics|lang=en terms the difference between superconvergent and superconvergence
is that superconvergent is (mathematics) converging very rapidly while superconvergence is (mathematics) very rapid convergence.
As an adjective superconvergent
is (mathematics) converging very rapidly.
As a noun superconvergence is
(mathematics) very rapid convergence.