Watercress
watermelon :D
Watercress is a vegetable. It begins with the letter w.
The Western Green Mamba snake is highly venomous. It begins with the letter w.
Cauliflower is a vegetable. The tuber of the broadleaf arrowhead is a vegetable.
vegetable that ends in the letter w
"White Christmas" begins with W.
W
Wales is a country in the UK that begins with W.
The whooper swan is a European bird. It begins with the letter W.
tallest tree
As far as I know, there is no Greek god whose name begins with W.
There is no mountain that begins with W.