Notropis cornutus vs silversides

Notropis cornutus and silversides both are nouns.

Word	Noun	Adjective	Verb	Adverb
Notropis cornutus	Yes	No	No	No
silversides	Yes	No	No	No

As nouns, Notropis cornutus and silversides are synonyms defined as:

Other synonyms of Notropis cornutus include common shiner.

Notropis cornutus (noun)	silversides (noun)
the common North American shiner	small fishes having a silver stripe along each side; abundant along the Atlantic coast of the United States
	the common North American shiner