Yogurt, Yo-yo, Yack, Yummy, Yes, Yellow...
yak, y not, yelp, yeaaahhh, yo-play
yesterday yo-yo yes yang ying you you're your
yell, yolk, yarn, yam etc.
young, youthful and .....
Yummy, yucky, yolky and yabby are some of the sweet words that start with the letter y.
Some four letter words that start with Y are:yankyardyarnyawnyeahyearyellyelpyipeyogayokeyolkyoreyouryowlyuckyuleyurt