Perk up and Shape up

Perk up verb - To become glad or hopeful.

Shape up and perk up are semantically related In some cases you can use "Shape up" instead a verb "Perk up".

Shape up verb - To take on a definite form.

Perk up and shape up are semantically related in improve topic. Sometimes you can use "Perk up" instead a verb "Shape up", if it concerns topics such as revive, make or become better.