gorgonian coral vs gorgonian

gorgonian coral and gorgonian both are nouns.

Word	Noun	Adjective	Verb	Adverb
gorgonian coral	Yes	No	No	No
gorgonian	Yes	No	No	No

As nouns, gorgonian coral and gorgonian are synonyms defined as:

gorgonian coral and gorgonian: corals having a horny or calcareous branching skeleton

gorgonian coral (noun)	gorgonian (noun)
corals having a horny or calcareous branching skeleton	corals having a horny or calcareous branching skeleton