Oratory rhymes with:
exploratory, celebratory, declaratory, excretory, expiratory, exploratory, laboratory, migratory, preparatory, accusatory, aleatory, ambulatory, anticipatory, articulatory, celebratory, circulatory, compensatory, conciliatory, confirmatory, confiscatory, congratulatory, contributory, declaratory, defamatory, depilatory, depository, deregulatory, derogatory, dilatory, discriminatory, dormitory, excretory, exculpatory, expiratory, explanatory, exploratory, hallucinatory, incantatory, inflammatory, inhibitory, interrogatory, investigatory, laboratory, laudatory, lavatory, mandatory, migratory, nondiscriminatory, obligatory, observatory, oscillatory, participatory, predatory, preparatory, prohibitory, purgatory, reformatory, regulatory, repository, respiratory, retaliatory, revelatory, signatory, statutory, transitory
Oratory sounds like:
oradour, orator, oratorio, order