monarch vs danaid butterfly

monarch and danaid butterfly both are nouns.

Word	Noun	Adjective	Verb	Adverb
monarch	Yes	No	No	No
danaid butterfly	Yes	No	No	No

As nouns, danaid butterfly is a hypernym of monarch; that is, danaid butterfly is a word with a broader meaning than monarch:

monarch: large migratory American butterfly having deep orange wings with black and white markings; the larvae feed on milkweed
danaid butterfly: large tropical butterfly with degenerate forelegs and an unpleasant taste

Other hypernyms of monarch include danaid.

monarch (noun)	danaid butterfly (noun)
large migratory American butterfly having deep orange wings with black and white markings; the larvae feed on milkweed	large tropical butterfly with degenerate forelegs and an unpleasant taste
a nation's ruler or head of state usually by hereditary right