Portnoy rhymes with:
benoy, canoy, delanoy, hanoi, vannoy, aloi, amboy, batboy, benoy, canoy, carmoy, chromalloy, conboy, conroy, delanoy, depoy, deroy, devoy, eloy, envoy, geoffroy, gilboy, godoy, graboy, hanoi, killjoy, lecroy, maloy, mcleroy, meloy, milloy, molloy, muckleroy, mulloy, peregoy, purifoy, raboy, rutskoi, secoy, synalloy, vanhoy, vannoy, viceroy
Portnoy sounds like:
paradyne, parden, pardini, pardon, part-time, partain, parten, parthenia, parthenon, parthian, partin, partition, partney, parton, parttime, partum, pepperdine, perdomo, perrodin, pertain, pertamina, portadown, portion, portman, portney, predation, predawn, preordain, preteen, prettyman, proration, protean, protein, protium, proton, pruden, prudhomme, purdham, purdin, purdom, purdon, purdum, puritan