Brig and Sunfish

Brig noun - A place of confinement for persons held in lawful custody.

Sunfish and brig are semantically related In some cases you can use "Sunfish" instead a noun "Brig".

Sunfish noun - Small carnivorous freshwater percoid fishes of North America usually having a laterally compressed body and metallic luster: crappies; black bass; bluegills; pumpkinseed.

Brig and sunfish are semantically related in boat propelled with wind by sailcloth topic. Sometimes you can use "Brig" instead a noun "Sunfish".