The difference between Cockscomb and Crest

Cockscomb as a noun:

The fleshy red crest of a rooster

Cockscomb as a noun:

A red cap once worn by court jesters

Cockscomb as a noun:

A yellow rattle,

Cockscomb as a noun:

An annual garden plant, , having showy red clusters of flowers

Cockscomb as a noun (archaic):

A conceited dandy

Cockscomb as a noun (nautical):

A serrated cleat once fitted to the yards of a square-rigged ship and used when the sail was being reefed

Crest as a noun:

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.

Crest as a noun:

The plume of feathers, or other decoration, worn on or displayed on a helmet; the distinctive ornament of a helmet.

Crest as a noun (heraldry):

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.

Crest as a noun:

The upper curve of a horse's neck.

Crest as a noun:

The ridge or top of a wave.

Crest as a noun:

The summit of a hill or mountain ridge.A helmet with a crest.

Crest as a noun:

The helm or head, as typical of a high spirit; pride; courage.

Crest as a noun:

The ornamental finishing which surmounts the ridge of a roof, canopy, etc.

Crest as a noun:

The top line of a slope or embankment.

Crest as a noun (anatomy):

A ridge along the surface of a bone.

Crest as a noun (informal):

A design or logo, especially one of an institution, association or high-class family.

Crest as a noun:

Any of several birds in the family Regulidae, including the goldcrests and firecrests.

Crest as a verb:

Particularly with reference to waves, to reach a peak.

Crest as a verb:

To furnish with, or surmount as, a crest; to serve as a crest for.

Crest as a verb:

To mark with lines or streaks like waving plumes.