spongefly vs spongillafly

spongefly and spongillafly both are nouns.

Word	Noun	Adjective	Verb	Adverb
spongefly	Yes	No	No	No
spongillafly	Yes	No	No	No

As nouns, spongefly and spongillafly are synonyms defined as:

spongefly and spongillafly: hairy-bodied insect whose larvae feed on freshwater sponges

spongefly (noun)	spongillafly (noun)
hairy-bodied insect whose larvae feed on freshwater sponges	hairy-bodied insect whose larvae feed on freshwater sponges