Wettest rhymes with:
cornettist, librettist, advantest, anabaptist, anesthetist, apprenticed, artist, baptist, bluntest, brightest, cornettist, cultist, dentist, faintest, fastest, fattest, fittest, greatest, hottest, lastest, latest, librettist, lightest, neatest, noticed, orthodontist, practiced, quietest, quietist, remotest, slightest, smartest, softest, strictest, sweetest, swiftest, tightest
Wettest sounds like:
watched, wedged, wedgewood, wedgwood, wetsuit, whiteside, whitest, whitewashed, whitsett, whitsitt, widest, widget, withstood, woodshed, woodside