smooth hammerhead vs Sphyrna zygaena

smooth hammerhead and Sphyrna zygaena both are nouns.

Word	Noun	Adjective	Verb	Adverb
smooth hammerhead	Yes	No	No	No
Sphyrna zygaena	Yes	No	No	No

As nouns, smooth hammerhead and Sphyrna zygaena are synonyms defined as:

smooth hammerhead and Sphyrna zygaena: fished for the hides and vitamin-rich liver

smooth hammerhead (noun)	Sphyrna zygaena (noun)
fished for the hides and vitamin-rich liver	fished for the hides and vitamin-rich liver