CREST

noun

1. The summit of a hill or mountain ridge.
2. A tuft, or other natural ornament, growing on an animal's head, for example the comb of a cockerel, the swelling on the head of a snake, the lengthened feathers of the crown or nape of bird, etc.
3. The plume of feathers, or other decoration, worn on or displayed on a helmet; the distinctive ornament of a helmet.

verb

1. Particularly with reference to waves, to reach a peak.
2. To reach the crest of (a hill or mountain)
3. To furnish with, or surmount as, a crest; to serve as a crest for.