Ancylus fluviatilis vs river limpet

Ancylus fluviatilis and river limpet both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ancylus fluviatilis	Yes	No	No	No
river limpet	Yes	No	No	No

As nouns, Ancylus fluviatilis and river limpet are synonyms defined as:

Ancylus fluviatilis and river limpet: minute conical gastropod superficially resembling a limpet but living and feeding on freshwater plants

Other synonyms of Ancylus fluviatilis include freshwater limpet.

Ancylus fluviatilis (noun)	river limpet (noun)
minute conical gastropod superficially resembling a limpet but living and feeding on freshwater plants	minute conical gastropod superficially resembling a limpet but living and feeding on freshwater plants