Prefabs rhymes with:
abbs, babbs, babs, cab's, cabs, crabbs, crabs, dabbs, drabs, grabs, habs, jabs, lab's, labs, labs', sab's, scabs, slabs, stabs, tabs
Prefabs sounds like:
paperback, paperbacks, paperboy's, paperboys, paribas, paribas's, perhaps, perovich, perpich, poorbaugh, porpoise, porpoises, powerbook, powerpc, powerpcs, powerpcs', prapas, preface, prefix, prepackage, prepuce, previews, previous, priebke, privacies, privacy, probasco, probe's, probes, proboscis, probus, profess, professes, profs, profuse, proofs, propes, prophecies, prophecy, prophesies, propose, proposes, propps, props, proves, provigo, provigo's, proviso, provisos, provoke, provokes, provus, purpose, purposes, purves, purveys, purvis