Shoot up and Settle down

Shoot up verb - To rise abruptly and rapidly.

Settle down and shoot up are semantically related in mature topic. In some cases you can use "Settle down" instead a verb "Shoot up", when it comes to topics like fully grown.

Settle down verb - To become still and orderly.

Shoot up and settle down are semantically related in mature topic. Sometimes you can use "Shoot up" instead a verb "Settle down", if it concerns topics such as fully grown.