· weightlessness
weather satellites
Weightlessness is a space word. It begins with the letter w.
wiry
waggishwarmthwarpathwashwashclothwaspishwatchweakfishweakishwealthwherewithwretchwrathwristwatchwhiplashwhitishwhitewashwhooshwhichwithwitchwordsmithworthwreath
"Wrong" is one of them.
Wreck, wrap, writhe, wrong, write, wrack, wrung...
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.
wonderful, whimsical, witty
Weightlessness and zero gravity are space words. They begin with the letters w and z.
Jupiter
Hubble telescope
x rays