Downright and Textbook

Downright adjective - Being or characterized by direct, brief, and potentially rude speech or manner.

Textbook and downright are semantically related. In some cases you can use "Textbook" instead an adjective "Downright".

Textbook adjective - Constituting, serving as, or worthy of being a pattern to be imitated.

Downright and textbook are semantically related. Sometimes you can use "Downright" instead an adjective "Textbook".