wonderful, whimsical, witty
Words beginning with you are limited to forms of you, youth and young. If you mean "Happy words beginning with a U sound," perhaps you refer to euphoric.
· weightlessness
wiry
waggishwarmthwarpathwashwashclothwaspishwatchweakfishweakishwealthwherewithwretchwrathwristwatchwhiplashwhitishwhitewashwhooshwhichwithwitchwordsmithworthwreath
"Wrong" is one of them.
positive words beggining with n
There are 2 - 18 letter words that begin with W. However, there are no 19 letter words in the English language that begin with W.
world-wide-web
4 letter words W - M: * warm * worm * whim * wham
happy time, humping, humming a tune out,
There are no distinct algebra words beginning with W. The term whole numbers can be used with some algebraic expressions.
whatever - what-ev-er