Strong-arm and Upper hand

Strong-arm verb - To make timid or fearful by or as if by threats.

Upper hand and strong-arm are semantically related. In some cases you can use "Upper hand" instead a noun phrase "Strong-arm".

Upper hand noun - The more favorable condition or position in a competition.

Strong-arm and upper hand are semantically related. Sometimes you can replace phrase "Strong-arm" with "Upper hand", this phrases are similar.