coronet

As a noun coronet

is a small crown worn by a noble in the british system, they are worn only at coronations the german equivalent is adelskrone .

As an adjective coronetted is

bearing one or more coronets.

As nouns the difference between coronet and crapaudine

is that coronet is a small crown worn by a noble in the british system, they are worn only at coronations the german equivalent is adelskrone while crapaudine is (rare) the socket in which the pivot of a door turns.