Marines and Swab

Marines noun - Members of a body of troops trained to serve on land or at sea.

Swab and marines are semantically related. in sailor topic. In some cases you can use "Swab" instead a noun "Marines", when it comes to topics like person who travels by sea.

Swab noun - One who operates or navigates a seagoing vessel.

Marines and swab are semantically related. Sometimes you can replace term "Marines" with "Swab", this nouns are similar.