Dimitrius's rhymes with:
elephantiasis, ilalis's, metastasis, microgenesys, molpus's, nemesis, organogenesis, parenthesis, photosynthesis, stephanopoulos's, telesis, urinalysis
Dimitrius's sounds like:
datametrics, deandrea's, demetrius, dentures, detonators, dimitrios, dimitrius, dimitrius', dimitruk, domtar's