silversides vs common shiner

silversides and common shiner both are nouns.

Word	Noun	Adjective	Verb	Adverb
silversides	Yes	No	No	No
common shiner	Yes	No	No	No

As nouns, silversides and common shiner are synonyms defined as:

Other synonyms of silversides include Notropis cornutus.

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