Words That Rhyme With "Omniscience" :
2 syllables:
bisson, byssus, christen, fichus, fictions, fission, frictions, Frisian, frison, glisten, gryphons, Issus, kitchen, listen, mission, patience, scission, Sison, stiffens, thissen, titian, vicious, vision
3 syllables:
abscission, addictions, addition, admission, afflictions, aglisten, allision, ambition, ambitious, attrition, audition, auspicious, capricious, coition, collision, commission, concision, condition, constrictions, contrition, convictions, decision, deficience, dehiscence, delicious, demission, dentition, depictions, derision, descriptions, detrition, discission, dismission, division, Domitian, edition, Egyptians, elision, elysian, emission, envision, evictions, excision, factitious, fictitious, flagitious, fruition, impatience, incision, inscriptions, judicious, logician, lubricious, magician, malicious, metrician, misprision, mortician, musician, narcissus, nutrition, nutritionary, nutritious, officious, omission, optician, Parisian, partition, patrician, perdition, permission, petition, physician, position, practician, precisian, precision, predictions, prescriptions, prevision, propitious, provision, pumiceous, rechristen, recision, recission, remission, rendition, rescission, restrictions, revision, rubrician, sedition, seditious, sericeous, siliceous, silicious, sortition, spadiceous, submission, subscriptions, suspicion, suspicious, tactician, tradition, transcriptions, transition, transmission, tuition, vendition, volition
4 syllables:
abolition, abolitionary, acoustician, adscititious, adventitious, apparition, apposition, avaricious, ballistician, bipartition, cementitious, cineritious, circumcision, coalition, coefficients, competition, composition, contradictions, cosmetician, decommission, deglutition, demolition, deposition, dietician, dietitian, disposition, ebullition, electrician, emollition, erudition, esthetician, exhibition, expedition, expeditious, exposition, extradition, imbibition, imposition, imprecision, indecision, inhibition, injudicious, innutrition, inofficious, intermission, intromission, intuition, jurisdictions, lateritious, logistician, malnutrition, manumission, micturition, multivision, obreptitious, obstetrician, opposition, parturition, persecutions, phonetician, photofission, politician, postposition, preadmission, precondition, predormition, preposition, preterition, pretermission, prodelision, prohibition, proposition, recondition, redhibition, repartition, repetition, repetitious, reposition, reprovision, retransmission, reviviscence, rhetorician, semantician, statistician, subaudition, subincision, subreptitious, superstition, superstitious, supervision, supposition, suppositious, surreptitious, tonetician, transposition, tripartition, unpropitious, unsuspicious
5 syllables:
academician, arithmetician, artifactitious, biometrician, contraposition, cybernetician, decomposition, diagnostician, dialectician, disinhibition, excrementitious, geometrician, geriatrician, holosericeous, indisposition, interposition, juxtaposition, mathematician, paediatrician, pediatrician, photoemission, photometrician, predisposition, presupposition, recomposition, redeposition, reimposition, stereoptician, superaddition, supposititious, uncircumcision, undernutrition, vomiturition
6 syllables:
bioclimatician, counterproposition, econometrician, geomagnetician, geopolitician, photocomposition, semipolitician, superimposition