Gray matter and Noddle

Gray matter noun - The ability to learn and understand or to deal with problems.

Noddle and gray matter are semantically related In some cases you can use "Noddle" instead a noun phrase "Gray matter".

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

Gray matter and noddle are semantically related in head topic. Sometimes you can use "Gray matter" instead a noun "Noddle".