"I'm thinking of things that begin with the letter . . " Y

     Yo-yo
       YouTube
         Yucky
            Yoga
           Yellow
          Yup!
            Ypsilanti
              Yellowstone
                  Yurt
                     Yancey
                     Yank
               Yoga
           Yorkie
     Yorkshire
   Yippee
  Young
   Y'all
     Yard
       Yes
         Yesterday
            Yet
              Yay
                Yonder
                Yuki
               Yea
              Yahoo
            Yum
          Yearn
           Yap
             Yarn
              Your
                 Yummy