Molpus's rhymes with:
dimitrius's, elephantiasis, ilalis's, metastasis, microgenesys, nemesis, organogenesis, parenthesis, photosynthesis, stephanopoulos's, telesis, urinalysis
Molpus's sounds like:
mailbag, mailbags, mailbox, mailboxes, malpass, malveaux, minilabs, molpus, molpus', muehlebach