A word that starts with y and ends with y is yay .
You
If u mean starts with a vowel and ends in a vowel, then Avalanche?
ungrateful
uncomprehensive
ultrasound
unfit
until, usual
If u mean starts with a vowel and ends in a vowel, then Avalanche?
tofu
There are a few words that end with the letter v. However, no words in the English language begin with u and end with v.
Menu
unify
caribou
upscale
ultrasound
uncomprehensive
unfit
ungrateful