Roughhewn and Untaught

Roughhewn adjective - Of stone or timber; shaped roughly without finishing.

Untaught and roughhewn are semantically related. in crude topic. In some cases you can use "Untaught" instead an adjective "Roughhewn", when it comes to topics like unrefined.

Untaught adjective - Lacking in education or the knowledge gained from books.

Roughhewn and untaught are semantically related. Sometimes you can replace term "Roughhewn" with "Untaught", this adjectives are similar.