Cheer up and Psych up

Cheer up verb - To become glad or hopeful.

Psych up and cheer up are semantically related In some cases you can use "Psych up" instead a verb "Cheer up".

Psych up verb - To prepare (oneself) mentally or emotionally.

Cheer up and psych up are semantically related in encourage topic. Sometimes you can use "Cheer up" instead a verb "Psych up", if it concerns topics such as stimulate spiritually.