Slingshot and Switchblade knife

Slingshot noun - A plaything consisting of a Y-shaped stick with elastic between the arms; used to propel small stones.

Switchblade knife and slingshot are semantically related. In some cases you can use "Switchblade knife" instead a noun "Slingshot".

Switchblade knife noun - A pocketknife with a blade that springs open at the press of a button.

Slingshot and switchblade knife are semantically related. Sometimes you can use "Slingshot" instead a noun phrase "Switchblade knife".