Ballistae and Rockers

Rockers and ballistae are semantically related. In some cases you can use "Rockers" instead a noun "Ballistae".

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.

Ballistae and rockers are semantically related. Sometimes you can use "Ballistae" instead a noun "Rockers".