Double-dealing and Unsporting

Double-dealing adjective - Marked by, based on, or done by the use of dishonest methods to acquire something of value.

Unsporting and double-dealing are semantically related. In some cases you can use "Unsporting" instead an adjective phrase "Double-dealing".

Unsporting adjective - Violating accepted standards or rules.

Double-dealing and unsporting are semantically related. Sometimes you can use "Double-dealing" instead an adjective "Unsporting".