twentieth, tenth, fortieth, fiftieth, thousandth, fifteenth, hundredth, sixtieth, twelfth, seventieth, fourteenth, thirteenth, sixteenth, seventeenth, eighteenth, eightieth, ninetieth, eleventh, billionth, nineteenth, tishri, millionth, quadrillionth, gigaton, equaling, fraction, ten, cubic centimeter, kislev, slowest, fourty, planet, equivalent, smallest, ninths, threescore, sixths, mflops, fifth, centi, aphelion, highest, terawatt, trillionth, fastest, autumnal equinox, parsec, seedtime, quincentenary, roughly, joules, per capita, richest, mark, warmest, driest, one, miniscule, eighth, perihelion, luckiest, shortest, rems, proxima centauri, per, measly, vernal equinox, micrometers, first, pinhead, sweatiest, spring equinox, cloudiest, shawwal, approximately, second, windiest, nonillion, greediest, happiest, conterminous, smelliest, optical telescope, average, poorest, lightest, roundest, baisakh, quickest, day, seventh, saddest, anniversary, raman effect, equinoxes, reverenced, largest, dwarfs, umbral, anno domini, shevat, fith, mile, sunday, 8th, fourth, fret, homily, hour, milestone, thursday, tuesday, year, 60th, 50th, 70th, ninth, 30th, 40th, sixth, 41st, 75th

31st, thirty-first

rank

30th, ordinal