army worm vs Pseudaletia unipuncta

army worm and Pseudaletia unipuncta both are nouns.

Word	Noun	Adjective	Verb	Adverb
army worm	Yes	No	No	No
Pseudaletia unipuncta	Yes	No	No	No

As nouns, army worm and Pseudaletia unipuncta are synonyms defined as:

army worm and Pseudaletia unipuncta: noctuid moth larvae that travel in multitudes destroying especially grass and grain

Other synonyms of army worm include armyworm.

army worm (noun)	Pseudaletia unipuncta (noun)
noctuid moth larvae that travel in multitudes destroying especially grass and grain	moth whose destructive larvae travel in multitudes
	noctuid moth larvae that travel in multitudes destroying especially grass and grain