scarlet bush vs hamelia

scarlet bush and hamelia both are nouns.

Word	Noun	Adjective	Verb	Adverb
scarlet bush	Yes	No	No	No
hamelia	Yes	No	No	No

As nouns, hamelia is a hypernym of scarlet bush; that is, hamelia is a word with a broader meaning than scarlet bush:

scarlet bush: handsome shrub with showy orange to scarlet or crimson flowers; Florida and West Indies to Mexico and Brazil
hamelia: any of several flowering tropical or subtropical shrubs of the genus Hamelia

scarlet bush (noun)	hamelia (noun)
handsome shrub with showy orange to scarlet or crimson flowers; Florida and West Indies to Mexico and Brazil	any of several flowering tropical or subtropical shrubs of the genus Hamelia