Cheval-de-frise and Slingshot

Cheval-de-frise noun - Defensive structure consisting of a movable obstacle composed of barbed wire or spikes attached to a wooden frame; used to obstruct cavalry.

Slingshot and cheval-de-frise are semantically related. In some cases you can use "Slingshot" instead a noun phrase "Cheval-de-frise".

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

Cheval-de-frise and slingshot are semantically related. Sometimes you can replace phrase "Cheval-de-frise" with "Slingshot", this terms are similar.