Illiberal and Not extreme

Illiberal adjective - Not broad or open in views or opinions.

Not extreme and illiberal are semantically related In some cases you can use "Not extreme" instead an adjective "Illiberal".

Illiberal and not extreme are semantically related in conservative topic. Sometimes you can use "Illiberal" instead an adjective phrase "Not extreme", if it concerns topics such as cautious.