Obstinacy rhymes with:
hennessey, hennessy, lunacy, accuracy, adequacy, advocacy, agassi, almasy, argosy, aristocracy, autocracy, barkocy, biopharmacy, bureaucracy, candidacy, celibacy, confederacy, conspiracy, courtesy, degeneracy, delicacy, democracy, diplomacy, ecstasy, embassy, fallacy, fantasy, galasie, geodesy, hennessey, hennessy, heresy, hypocrisy, idiocy, illegitimacy, illiteracy, immediacy, inaccuracy, inadequacy, intimacy, intricacy, jealousy, legacy, legitimacy, leprosy, literacy, lunacy, meritocracy, odyssey, papacy, pharmacy, piracy, pleurisy, policy, primacy, privacy, prophecy, secrecy, semisecrecy, spellacy, supremacy, surrogacy, theocracy
Obstinacy sounds like:
objecting, objection's, objections, officiating, offsetting, opposition's, oppositions