Greenhorn and Simpleton

Greenhorn noun - A person who is just starting out in a field of activity.

Simpleton and greenhorn are semantically related in inexperienced person topic. In some cases you can use "Simpleton" instead a noun "Greenhorn".

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

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