Propp rhymes with:
prop, crop, cropp, drop, gropp, kropp, prop, raap, ropp, schropp, tropp
Propp sounds like:
paperboy, prab, prebe, prefab, prep, prepay, preppie, preppy, preview, prevo, priebe, privy, prob, proba, probe, prof., proof, prop, prove, provo, purifoy, purify, purpa, purvey, purview