Question

some words of starting y and ending with y

Answer 1

there are some word:-
Yay,
yesterday,
yummy,
youthy,
yucky

Answer 2

Here is your answer..

yesterday,
yummy,
youthy,
yucky, youthfully, Yenisey,
yearly,
yeasty,
yuppy,
yecchy, yieldingly, yeomanry, yawny, yearningly,
yeomanly...