Scotch marigold vs calendula

Scotch marigold and calendula both are nouns.

Word	Noun	Adjective	Verb	Adverb
Scotch marigold	Yes	No	No	No
calendula	Yes	No	No	No

As nouns, calendula is a hypernym of Scotch marigold; that is, calendula is a word with a broader meaning than Scotch marigold:

Scotch marigold: the common European annual marigold
calendula: any of numerous chiefly annual herbs of the genus Calendula widely cultivated for their yellow or orange flowers; often used for medicinal and culinary purposes

Scotch marigold (noun)	calendula (noun)
the common European annual marigold	any of numerous chiefly annual herbs of the genus Calendula widely cultivated for their yellow or orange flowers; often used for medicinal and culinary purposes