Pitman and Rockers

Pitman noun - Someone who works in a coal mine.

Rockers and pitman are semantically related. In some cases you can replace term "Rockers" with "Pitman", this nouns are similar.

Rockers noun - Originally a British youth subculture that evolved out of the teddy boys in the 1960s; wore black leather jackets and jeans and boots; had greased hair and rode motorcycles and listened to rock'n'roll; were largely unskilled manual laborers.

Pitman and rockers are semantically related. You can use "Pitman" instead a noun "Rockers".