young
yobbish
· youthful
Some four letter words beginning with Y are:yardyarnyawnyearyellyelpyokeyolkyouryurt
Yodeling.
youngster
· yappy
· youthful
Very few words in English have the letter Y as an initial vowel. Examples include the archaic word "yclept" and the element yttrium.
Anxiety
Yoeman
yon
Yacht, yawl
There are some behavioral words of a child that begin with y: yelping, yelling, yacking. Other describing words are: youthful, young, youngster.