crest

ot 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.
4. A bearing worn, not upon the shield, but usually on a helmet above it, sometimes (as for clerics) separately above the shield or separately as a mark for plate, in letterheads, and the like.

fe’l 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.
4. To mark with lines or streaks like waving plumes.