Napkin and Swab

Napkin noun - A small piece of table linen that is used to wipe the mouth and to cover the lap in order to protect clothing.

Swab and napkin are semantically related. In some cases you can use "Swab" instead a noun "Napkin".

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

Napkin and swab are semantically related. Sometimes you can use "Napkin" instead a noun "Swab".