Wiktionary
whitecapped
a. (context poetic English) cap with whiteness (such as snow or sea foam).
Usage examples of "whitecapped".
Every wave was whitecapped, and the great hills of the ground swells were obscured by foam flying off the crests and rolling in the troughs.
The countertops were lined with cups and glasses and plates and cereal boxes, and a giant jar of Metamucil with prescription bottles clustered around it like whitecapped toadstools.