Cockscomb and Perimeter

Cockscomb noun - The fleshy red crest on the head of the domestic fowl and other gallinaceous birds.

Perimeter and cockscomb are semantically related. In some cases you can use "Perimeter" instead a noun "Cockscomb".

Perimeter noun - The line or relatively narrow space that marks the outer limit of something.

Cockscomb and perimeter are semantically related. Sometimes you can use "Cockscomb" instead a noun "Perimeter".