Bullhead and Cold fish

Bullhead noun - Freshwater sculpin with a large flattened bony-plated head with hornlike spines.

Cold fish and bullhead are semantically related. in pigheaded topic. In some cases you can use "Cold fish" instead an adjective "Bullhead".

Cold fish noun - A cold aloof person.

Bullhead and cold fish are semantically related. You can use "Bullhead" instead an adjective phrase "Cold fish".