Thesaurus

(n) : a tuft, or other excrescence or natural ornament, growing on an animal's head; the comb of a cock; the swelling on the head of a serpent; the lengthened feathers of the crown or nape of bird, etc; the plume of feathers, or other decoration, worn on or displayed above a helmet; the distinctive ornament of a helmet, indicating the rank of the wearer

(v) : particularly with reference to waves, to reach a peak