Noddle and Simpleton

Noddle noun - The upper or front part of the body that contains the brain, the major sense organs, and the mouth.

Simpleton and noddle are semantically related. In some cases you can use "Simpleton" instead a noun "Noddle".

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

Noddle and simpleton are semantically related. Sometimes you can replace term "Noddle" with "Simpleton", this nouns are similar.