decoy vs lay for

decoy

• To lead into danger by artifice; to lure into a net or snare; to entrap. 

• To act as, or use, a decoy. 

• A real or fake animal used by hunters to lure game. 

• A person or object meant to lure somebody into danger. 

• Deceptive military device used to draw enemy attention or fire away from a more important target. 

lay for

• To wait (for someone) in order to surprise or attack them.