Hard hat and Lid

Hard hat noun - A lightweight protective helmet (plastic or metal) worn by construction workers.

Lid and hard hat are semantically related. In some cases you can use "Lid" instead a noun phrase "Hard hat".

Lid noun - A piece placed over an open container to hold in, protect, or conceal its contents.

Hard hat and lid are semantically related. Sometimes you can use "Hard hat" instead a noun "Lid".