Stiff upper lip and Self-restraint

Stiff upper lip noun - Self-restraint in the expression of emotion (especially fear or grief).

Self-restraint and stiff upper lip are semantically related. In some cases you can use "Self-restraint" instead a noun phrase "Stiff upper lip".

Self-restraint noun - The power to control one's actions, impulses, or emotions.

Stiff upper lip and self-restraint are semantically related. Sometimes you can replace phrase "Stiff upper lip" with "Self-restraint", this phrases are similar.