Crest
/kɹɛst/
noun
The summit of a hill or mountain ridge.
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.
The plume of feathers, or other decoration, worn on or displayed on a helmet; the distinctive ornament of a helmet.
verb
Particularly with reference to waves, to reach a peak.
To reach the crest of (a hill or mountain)
To furnish with, or surmount as, a crest; to serve as a crest for.