Cold fish and Hard-hearted

Cold fish noun - A cold aloof person.

Hard-hearted and cold fish are semantically related In some cases you can use "Hard-hearted" instead an adjective phrase "Cold fish".

Hard-hearted adjective - Having or showing a lack of sympathy or tender feelings.

Cold fish and hard-hearted are semantically related in unchanged topic. You can use "Cold fish" instead an adjective phrase "Hard-hearted", if it concerns topics such as cold, remote, pigheaded.