Balanus balanoides vs cirripede

Balanus balanoides and cirripede both are nouns.

Word	Noun	Adjective	Verb	Adverb
Balanus balanoides	Yes	No	No	No
cirripede	Yes	No	No	No

As nouns, cirripede is a hypernym of Balanus balanoides; that is, cirripede is a word with a broader meaning than Balanus balanoides:

Balanus balanoides: barnacle that attaches to rocks especially in intertidal zones
cirripede: marine crustaceans with feathery food-catching appendages; free-swimming as larvae; as adults form a hard shell and live attached to submerged surfaces

Other hypernyms of Balanus balanoides include barnacle, cirriped.

Balanus balanoides (noun)	cirripede (noun)
barnacle that attaches to rocks especially in intertidal zones	marine crustaceans with feathery food-catching appendages; free-swimming as larvae; as adults form a hard shell and live attached to submerged surfaces