Radiuses, crisises, antennas, appendixes, criterions, stimuluses, enceclopedias, prognosises, sanatoriums, axises, aircraftes, mediumes, matrixes, nebulas, phasises, optimumes, syllabuses, supernovas, synthesises, spectrumes, thesises, equipmentes, maximumes, hypothesises, equilibriumes, millenniumes, oasises, cirriculumes, phonemonones, analysises, alimnas, alumnas, alumnuses, bureaus, halfs, humans being, personas, atriumes, experiences, spas, issies, researches, how and why (wtf? этот вопрос не поставить во множественное число как и сл. предложение.), do and don't, literatus, tenetes.