Unpolished and Ungraded

Unpolished adjective - Lacking in refinement or good taste.

Ungraded and unpolished are semantically related In some cases you can use "Ungraded" instead an adjective "Unpolished".

Ungraded adjective - Not arranged in order hierarchically.

Unpolished and ungraded are semantically related in crude topic. Sometimes you can use "Unpolished" instead an adjective "Ungraded", if it concerns topics such as unrefined.