A large Australian cockatoo, Cacatua galerita, with a yellow erectile crest.

the sulfur-crested cockatoo

A hat with the brim turned up to form two or three points; a bicorn or tricorn

The fleshy red crest of a rooster / A red cap once worn by court jesters / A yellow rattle, Rhinanthus minor (flowering plant native to Eurasia)

One who breeds gamecocks or engages in the sport of cockfighting. / (dated) One who hunts woodcocks. / (colloquial) A cocker spaniel, either of two breeds of dogs originally bred for hunting woodcocks.

A rustic high shoe; half-boot. / (obsolete) A quiver.

(UK, informal) Friend, mate.

To make a nestle-cock of; to indulge or pamper (particularly of children).

The shell of a cockle (or similar shell). / A small, flimsy boat.

(informal) A mixture of drugs used to commit suicide (containing propoxyphene as one of the constituents).