Uncouth and Untoward

Uncouth adjective - Having or showing crudely insensitive or impolite manners.

Untoward and uncouth are semantically related in unfavourable topic. In some cases you can use "Untoward" instead an adjective "Uncouth".

Untoward adjective - Given to resisting authority or another's control.

Uncouth and untoward are semantically related in improper topic. Sometimes you can use "Uncouth" instead an adjective "Untoward", if it concerns topics such as unfavourable.