Synonyms for First include:
1000th, 100th, 101st, 105th, 10th, 110th, 115th, 11th, 120th, 125th, 12th, 130th, 135th, 13th, 140th, 145th, 14th, 150th, 155th, 15th, 160th, 165th, 16th, 170th, 175th, 17th, 180th, 18th, 190th, 19th, 1st, 200th, 20th, 21st, 22nd, 23rd, 24th, 25th, 26th, 27th, 28th, 29th, 2d, 2nd, 300th, 30th, 31st, 32nd, 33rd, 34th, 35th, 36th, 37th, 38th, 39th, 3rd, 400th, 40th, 41st, 42nd, 43rd, 44th, 45th, 46th, 47th, 48th, 49th, 4th, 500th, 50th, 55th, 5th, 60th, 64th, 65th, 6th, 70th, 75th, 7th, 80th, 85th, 8th, 90th, 95th, 9th, aboriginal, advance, advanced, anterior, archaean, archaeozoic, archean, archeozoic, archetypal, archetypical, avant-garde, azoic, basic, beforehand, beginning, best, billionth, capital, centesimal, champion, creative, daring, direct, earlier, earliest, early, earlyish, eighteenth, eighth, eightieth, eighty-fifth, eldest, eleventh, essential, fifteenth, fifth, fiftieth, fifty-fifth, first, first-string, first-year, firstborn, firsthand, five-hundredth, fore, foremost, fortieth, forty-eighth, forty-fifth, forty-first, forty-fourth, forty-ninth, forty-second, forty-seventh, forty-sixth, forty-third, forward, four-hundredth, fourteenth, fourth, freehand, freehanded, fresh, freshman, front, frontal, frontmost, germinal, go-to-meeting, good, groundbreaking, head-on, high-grade, hundred-and-eightieth, hundred-and-fifteenth, hundred-and-fifth, hundred-and-fiftieth, hundred-and-fifty-fifth, hundred-and-first, hundred-and-fortieth, hundred-and-forty-fifth, hundred-and-ninetieth, hundred-and-seventieth, hundred-and-seventy-fifth, hundred-and-sixtieth, hundred-and-sixty-fifth, hundred-and-tenth, hundred-and-thirtieth, hundred-and-thirty-fifth, hundred-and-twentieth, hundred-and-twenty-fifth, hundredth, in advance, inaugural, incomparable, initial, initiative, initiatory, innovational, innovative, introductory, low, maiden, millionth, n-th, new, newfangled, nineteenth, ninetieth, ninety-fifth, ninth, novel, nth, opening, optimal, optimum, ordinal, original, originative, particular, premature, premier, premiere, previous, primaeval, primal, primary, prime, primeval, primo, primordial, prizewinning, proterozoic, proto, prototypal, prototypic, prototypical, quadrillionth, quaternary, quintillionth, record-breaking, second, second-best, seminal, seventeenth, seventh, seventieth, seventy-fifth, sixteenth, sixth, sixtieth, sixty-fifth, sixty-fourth, special, starting, Sunday-go-to-meeting, superfine, superior, tenth, tertiary, third, thirteenth, thirtieth, thirty-eighth, thirty-fifth, thirty-first, thirty-fourth, thirty-ninth, thirty-second, thirty-seventh, thirty-sixth, thirty-third, thousandth, three-hundredth, top, top-grade, top-quality, trillionth, twelfth, twentieth, twenty-eighth, twenty-fifth, twenty-first, twenty-fourth, twenty-ninth, twenty-second, twenty-seventh, twenty-sixth, twenty-third, two-hundredth, umpteenth, umptieth, umteenth, uncomparable, unconventional, underivative, unexceeded, unexcelled, unsurpassable, unsurpassed, untimely, wee, world-class, zero, zeroth
first is a ADJ.
first, first of, first of all, first off, firstly, for the first time, foremost
first is a ADV.
beginning, commencement, first, first base, first gear, first-class honours degree, get-go, kickoff, low, low gear, number 1, number one, offse, offset, outset, showtim, showtime, start, starting time
first is a NOUN.
