Barnacles and Cirriped

Cirriped and barnacles are semantically related. In some cases you can use "Cirriped" instead a noun "Barnacles".

Cirriped noun - Marine crustaceans with feathery food-catching appendages; free-swimming as larvae; as adults form a hard shell and live attached to submerged surfaces.

Barnacles and cirriped are semantically related. Sometimes you can replace term "Barnacles" with "Cirriped", this nouns are similar.