Wilson. There is a horse at my stable with that name, and he's a bay.
As far as I know, there is no Greek god whose name begins with W.
wonda
wagon
Wiggly
equestrian
A whittling knife?
Water. Wine. Whiskey.
Waterpolo :)
Whisper.
Waddle is a name for a girl duck. It begins with W.
An antelope that begins with w and ends in d
whale