Denim and Workwear

Denim noun - (usually plural) close-fitting trousers of heavy denim for manual work or casual wear.

Workwear and denim are semantically related. In some cases you can use "Workwear" instead a noun "Denim".

Workwear noun - Heavy-duty clothes for manual or physical work.

Denim and workwear are semantically related. Sometimes you can replace term "Denim" with "Workwear", this nouns are similar.