tobacco budworm vs bollworm

tobacco budworm and bollworm both are nouns.

Word	Noun	Adjective	Verb	Adverb
tobacco budworm	Yes	No	No	No
bollworm	Yes	No	No	No

As nouns, bollworm is a hypernym of tobacco budworm; that is, bollworm is a word with a broader meaning than tobacco budworm:

tobacco budworm: larva of a noctuid moth; highly destructive to especially corn and cotton and tomato crops
bollworm: any of various moth caterpillars that destroy cotton bolls

tobacco budworm (noun)	bollworm (noun)
larva of a noctuid moth; highly destructive to especially corn and cotton and tomato crops	any of various moth caterpillars that destroy cotton bolls