Gratuities rhymes with:
annuities, annuities, authorities', authority's, availabilities, banalities, causalities, cavities, celebrities, celebrity's, charities', christianity's, community's, complexities, complicities, eccentricities, entities, entities', facility's, humanities, humanity's, identities, illegalities, immunities, indemnities, inequalities, infidelities, infirmities, insecurities, instabilities, legalities, localities, majorities, maturities, municipalities, nationalities, necessities, niceties, obscenities, personalities, principalities, rarities, rigidities, sensibilities, sensitivities, trinity's, universities', varity's, vulnerabilities
Gratuities sounds like:
garret's, garrets, garrett's, gartzke, garuda's, geerdes, geerts, gerdes, gerdes', gerdts, gerrits, gertsch, gertz, geurts, gewirtz, girds, goertz, goradze, gordji, gordy's, gorrids, gourds, gradco, grades, grads, graduates, gradus, graetz, grates, gratis, gratuitous, gratz, great's, greathouse, greats, greets, greitz, greta's, gretz, gretzky, grid's, grids, grites, grits, gritz, grodsky, grotesque, grothaus, grotz, growth's, growths, grudge, grudges, guard's, guards, gurtz, gyrates