army cutworm vs cutworm

army cutworm and cutworm both are nouns.

Word	Noun	Adjective	Verb	Adverb
army cutworm	Yes	No	No	No
cutworm	Yes	No	No	No

As nouns, cutworm is a hypernym of army cutworm; that is, cutworm is a word with a broader meaning than army cutworm:

army cutworm: larvae (of a noctuid moth) that travel in large groups and destroy grains and alfalfa in the midwestern states
cutworm: North American moth whose larvae feed on young plant stems cutting them off at the ground

army cutworm (noun)	cutworm (noun)
larvae (of a noctuid moth) that travel in large groups and destroy grains and alfalfa in the midwestern states	North American moth whose larvae feed on young plant stems cutting them off at the ground