Balanus balanoides vs rock barnacle

Balanus balanoides and rock barnacle both are nouns.

Word	Noun	Adjective	Verb	Adverb
Balanus balanoides	Yes	No	No	No
rock barnacle	Yes	No	No	No

As nouns, Balanus balanoides and rock barnacle are synonyms defined as:

Balanus balanoides and rock barnacle: barnacle that attaches to rocks especially in intertidal zones

Other synonyms of Balanus balanoides include acorn barnacle.

Balanus balanoides (noun)	rock barnacle (noun)
barnacle that attaches to rocks especially in intertidal zones	barnacle that attaches to rocks especially in intertidal zones