Sialis lutaria vs alderfly

Sialis lutaria and alderfly both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sialis lutaria	Yes	No	No	No
alderfly	Yes	No	No	No

As nouns, Sialis lutaria and alderfly are synonyms defined as:

Sialis lutaria and alderfly: dark-colored insect having predaceous aquatic larvae

Other synonyms of Sialis lutaria include alder fly.

Sialis lutaria (noun)	alderfly (noun)
dark-colored insect having predaceous aquatic larvae	dark-colored insect having predaceous aquatic larvae