What's the difference between contumely and improperation?

Contumely

Definition:

• (n.) Rudeness compounded of haughtiness and contempt; scornful insolence; despiteful treatment; disdain; contemptuousness in act or speech; disgrace.

Example Sentences:

Improperation

Definition:

• (n.) The act of upbraiding or taunting; a reproach; a taunt.

Example Sentences: