rozelle vs hibiscus

rozelle and hibiscus both are nouns.

Word	Noun	Adjective	Verb	Adverb
rozelle	Yes	No	No	No
hibiscus	Yes	No	No	No

As nouns, hibiscus is a hypernym of rozelle; that is, hibiscus is a word with a broader meaning than rozelle:

rozelle: East Indian sparsely prickly annual herb or perennial subshrub widely cultivated for its fleshy calyxes used in tarts and jelly and for its bast fiber
hibiscus: any plant of the genus Hibiscus

rozelle (noun)	hibiscus (noun)
East Indian sparsely prickly annual herb or perennial subshrub widely cultivated for its fleshy calyxes used in tarts and jelly and for its bast fiber	any plant of the genus Hibiscus