Spodoptera frugiperda vs fall armyworm

Spodoptera frugiperda and fall armyworm both are nouns.

Word	Noun	Adjective	Verb	Adverb
Spodoptera frugiperda	Yes	No	No	No
fall armyworm	Yes	No	No	No

As nouns, Spodoptera frugiperda and fall armyworm are synonyms defined as:

Spodoptera frugiperda and fall armyworm: larva of a migratory American noctuid moth; destroys grasses and small grains

Spodoptera frugiperda (noun)	fall armyworm (noun)
larva of a migratory American noctuid moth; destroys grasses and small grains	larva of a migratory American noctuid moth; destroys grasses and small grains
moth whose larvae are fall armyworms