The difference between Caruncle and Crest

Caruncle as a noun:

A small, fleshy excrescence that is a normal part of an animal's anatomy.

Caruncle as a noun:

A similar excrescence near the hilum of some seeds.

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.