Olympias rhymes with:
copious, acrimonious, aeneas, aerolineas, agregious, alias, amphibious, antonius, aquarius, aqueous, bilious, bockius, bournias, brosious, celsius, claudius, coleus, commodious, contemporaneous, copious, courteous, curious, cyrenius, deleterious, delirious, demetrius, denarius, devious, dimitrius, dimitrius', dionysius, dubious, envious, erroneous, extraneous, fabrizius, fastidious, felonious, fresenius, furious, gaseous, glorious, gregarious, habeas, harmonious, hideous, hilarious, homogeneous, hovious, igneous, ignominious, illustrious, imperious, impervious, indubious, industrious, inglorious, injurious, insidious, instantaneous, invidious, laborious, lacksadaiscious, lascivious, lugubrious, luxurious, marius, masius, mauritius, melodious, meritorious, miscellaneous, mobius, morphonios, murias, mysterious, nefarious, notorious, nucleus, oblivious, obsequious, obvious, octavius, odious, odysseus, orpheus, palonius, pancreas, parsimonious, penurious, percutaneous, perseus, phineas, plinius, precarious, previous, punctilious, radius, sanctimonious, sergius, serious, simultaneous, spontaneous, spurious, stradivarius, studious, supercilious, tavoulareas, tedious, thaddeus, thelonius, unceremonious, various, vesuvius, vicarious, victorious, vilnius, vitreous, vitruvius, yglesias
Olympias sounds like:
olympia's, olympic, olympic's, olympics, olympus