Fortuitous rhymes with:
circuitous, circuitous, duplicitous, precipitous, serendipitous, ubiquitous, actus, aeltus, alatas, albertus, altus, anacortes, apparatus, apprentice, armistice, arthritis, artus, asbestos, augustus, bartus, batus, berettas, bronchitis, brountas, brutus, cactus, calamitous, cetus, circuitous, coitus, comitatus, copetas, countess, curtis, decurtis, denktas, detritus, dittus, divinitas, duplicitous, emeritus, encephalitis, equitas, erastus, eucalyptus, eustace, eustis, faustus, felicitous, feltus, festus, fetus, fleitas, fortas, fremitus, gastritis, gittis, glottis, gratis, gratuitous, gravitas, gustus, hepatitis, hiatus, hippolytus, homo-erectus, hostess, impetus, justice, justus, koskotas, laryngitis, lattice, lettuce, lintas, loftus, lotus, lotus', malpractice, margaritas, martus, mastoiditis, meningitis, milpitas, momentous, mottus, notice, optus, osteoarthritis, pettus, pilatus, pocahontas, portentous, poultice, practice, precipitous, priestess, prophetess, prospectus, proventus, qantas, rastus, riotous, robustas, santas, serendipitous, sextus, situs, solicitous, status, stratus, thetis, titus, tortoise, treatise, ubiquitous, unitas, wojtas, zemaitis
Fortuitous sounds like:
faraday's, favorites, ferdig, ferrets, fertig, fibroids, foertsch, ford's, fordice, fords, fordyce, foreheads, fortas, fortas's, fortes, forties, fortis, forts, forty's, forwards, fourth's, fourths, frates, fratus, fratzke, frauds, fred's, freddy's, freed's, freidy's, freitag, freitas, frets, fretz, freud's, freytag, friday's, fridays, fridge, fridges, fritch, fritos, frits, fritsch, fritsche, fritts, fritz, fritze, fritzi, fritzie, fritzsche, froedge, froths, fruitcake, fruitcakes, fruits, frutchey, furtak, furtick