No. No they arent. Bitter and winter melons are treated as vegetables in cooking, despite being botanically and legally (ie: for taxation purposes) a fruit.
Watermelon doesnt even come that close. It's just a fruit and the type of fruit it is is a berry.
TinyDing-dongAhhhh...Aww, man, when Dai-chan sees this..."I Wonder If She Will Forgive Me?"Almost at Dai-chan's~I wonder if she'll be mad.