Nouns

(n)snowball, sweet sand verbena, Abronia ellipticaplant having heads of fragrant white trumpet-shaped flowers; grows in sandy arid regions
(n)snowballball of ice cream covered with coconut and usually chocolate sauce
(n)snowballball of crushed ice with fruit syrup
(n)snowballsnow pressed into a ball for throwing (playfully)

Verbs

(v)snowballincrease or accumulate at a rapidly accelerating rate
(v)snowballthrow snowballs at