Manduca sexta vs hawkmoth

Manduca sexta and hawkmoth both are nouns.

Word	Noun	Adjective	Verb	Adverb
Manduca sexta	Yes	No	No	No
hawkmoth	Yes	No	No	No

As nouns, hawkmoth is a hypernym of Manduca sexta; that is, hawkmoth is a word with a broader meaning than Manduca sexta:

Manduca sexta: moth whose larvae are tobacco hornworms
hawkmoth: any of various moths with long narrow forewings capable of powerful flight and hovering over flowers to feed

Other hypernyms of Manduca sexta include hawk moth, hummingbird moth, sphingid, sphinx moth.

Manduca sexta (noun)	hawkmoth (noun)
moth whose larvae are tobacco hornworms	any of various moths with long narrow forewings capable of powerful flight and hovering over flowers to feed
large green white-striped hawkmoth larva that feeds on tobacco and related plants; similar to tomato hornworm