Thesaurus

0, 1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 2, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 3, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 4, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 5, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 6, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 7, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 8, 80, 9, ane, cardinal, dozen, eight, eighteen, eighty, eighty-one, eleven, fifteen, fifty, fifty-eight, fifty-five, fifty-four, fifty-nine, fifty-one, fifty-seven, fifty-six, fifty-three, fifty-two, five, forty, forty-eight, forty-five, forty-four, forty-nine, forty-one, forty-seven, forty-six, forty-three, forty-two, four, fourscore, fourteen, half dozen, half-dozen, i, ii, iii, il, ilx, ilxx, ilxxx, iv, ix, ixl, l, li, lii, liii, liv, lv, lvi, lvii, lviii, lx, lxi, lxii, lxiii, lxiv, lxv, lxvi, lxvii, lxviii, lxx, lxxi, lxxii, lxxiii, lxxiv, lxxv, lxxvi, lxxvii, lxxviii, lxxx, nine, nineteen, non-zero, one, seven, seventeen, seventy, seventy-eight, seventy-five, seventy-four, seventy-nine, seventy-one, seventy-seven, seventy-six, seventy-three, seventy-two, six, sixteen, sixty, sixty-eight, sixty-five, sixty-four, sixty-nine, sixty-one, sixty-seven, sixty-six, sixty-three, sixty-two, ten, thirteen, thirty, thirty-eight, thirty-five, thirty-four, thirty-nine, thirty-one, thirty-seven, thirty-six, thirty-three, thirty-two, three, threescore, twelve, twenty, twenty-eight, twenty-five, twenty-four, twenty-nine, twenty-one, twenty-seven, twenty-six, twenty-three, twenty-two, two, twoscore, v, vi, vii, viii, x, xi, xii, xiii, xiv, xix, xl, xli, xlii, xliii, xliv, xlv, xlvi, xlvii, xlviii, xv, xvi, xvii, xviii, xx, xxi, xxii, xxiii, xxiv, xxix, xxv, xxvi, xxvii, xxviii, xxx, xxxi, xxxii, xxxiii, xxxiv, xxxv, xxxvi, xxxvii, xxxviii, zero

xxi is a ADJ.

21, twenty-one, XXI

XXI is a NOUN.