  We present a generalization of the Rezzolla-Zhidenko theory-agnostic
parametrization of black-hole spacetimes to accommodate spherically-symmetric
Lorentzian, traversable wormholes (WHs) in an arbitrary metric theory of
gravity. By applying our parametrization to various known WH metrics and
performing calculations involving shadows and quasinormal modes, we show that
only a few parameters are important for finding potentially observable
quantities in a WH spacetime.
