Madman and Simpleton

Madman noun - A person who seeks out very dangerous or foolhardy adventures with no apparent fear.

Simpleton and madman are semantically related in fool topic. In some cases you can use "Simpleton" instead a noun "Madman", when it comes to topics like lunatic.

Simpleton noun - A person who lacks good sense or judgment.

Madman and simpleton are semantically related in lunatic topic. Sometimes you can use "Madman" instead a noun "Simpleton".