Samia cynthia vs wild wilkworm

Samia cynthia and wild wilkworm both are nouns.

Word	Noun	Adjective	Verb	Adverb
Samia cynthia	Yes	No	No	No
wild wilkworm	Yes	No	No	No

As nouns, wild wilkworm is a hypernym of Samia cynthia; that is, wild wilkworm is a word with a broader meaning than Samia cynthia:

Samia cynthia: large green silkworm of the cynthia moth
wild wilkworm: larva of a saturniid moth; spins a large amount of strong silk in constructing its cocoon

Other hypernyms of Samia cynthia include giant silkworm, silkworm.

Samia cynthia (noun)	wild wilkworm (noun)
large Asiatic moth introduced into the United States; larvae feed on the ailanthus	larva of a saturniid moth; spins a large amount of strong silk in constructing its cocoon
large green silkworm of the cynthia moth