Pip and Pit

Pip noun - A small area that is different (as in color) from the main part.

Pit is a synonym for pip in seed topic. In some cases you can use "Pit" instead a noun "Pip", when it comes to topics like start.

Pit noun - A sunken area forming a separate space.

Pip is a synonym for pit in start topic. You can use "Pip" instead a noun "Pit", if it concerns topics such as stone.