Mammoth Uncensored Word List:
24 - 9 letter words starting with ya

yabbering yachtings yachtsman yachtsmen yahooisms yahrzeits yakimonos yakitoris yammerers yammering yappingly yardbirds yardlands yardstick yardwands yardworks yarmelkes yarmulkas yarmulkes yarramans yataghans yattering yawmeters yawningly