Hard hat and Silk-stocking

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

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

Silk-stocking adjective - Having goods, property, or money in abundance.

Hard hat and silk-stocking are semantically related in moderate topic. Sometimes you can use "Hard hat" instead a noun phrase "Silk-stocking", if it concerns topics such as conservative.