stonefly vs plecopteran

stonefly and plecopteran both are nouns.

Word	Noun	Adjective	Verb	Adverb
stonefly	Yes	No	No	No
plecopteran	Yes	No	No	No

As nouns, stonefly and plecopteran are synonyms defined as:

stonefly and plecopteran: primitive winged insect with a flattened body; used as bait by fishermen; aquatic gilled larvae are carnivorous and live beneath stones

Other synonyms of stonefly include stone fly.

stonefly (noun)	plecopteran (noun)
primitive winged insect with a flattened body; used as bait by fishermen; aquatic gilled larvae are carnivorous and live beneath stones	primitive winged insect with a flattened body; used as bait by fishermen; aquatic gilled larvae are carnivorous and live beneath stones