Triviality rhymes with:
confidentiality, congeniality, extraterritoriality, geniality, partiality, reality, unreality, abnormality, actuality, bisexuality, brutality, commonality, confidentiality, congeniality, criticality, dimensionality, duality, extraterritoriality, fatality, finality, formality, frugality, generality, geniality, homosexuality, hospitality, impersonality, irrationality, legality, lethality, liberality, locality, mentality, modality, morality, mortality, municipality, musicality, nationality, neutrality, normality, partiality, practicality, reality, sensuality, sexuality, spirituality, theatricality, tonality, totality, universality, unreality, vitality
Triviality sounds like:
thorvald, threefold, travelday, traveled, travelled, travolta, trebled, tripled, triplet, triplett, troubled, trueblood