Mutual opposition and Oppositeness

Mutual opposition noun - A relation between two opposite attributes or tendencies.

Oppositeness and mutual opposition are semantically related. In some cases you can use "Oppositeness" instead a noun phrase "Mutual opposition".

Oppositeness noun - The quality or state of being as different as possible.

Mutual opposition and oppositeness are semantically related. Sometimes you can replace phrase "Mutual opposition" with "Oppositeness", this terms are similar.