flame tree vs bottle-tree

flame tree and bottle-tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
flame tree	Yes	No	No	No
bottle-tree	Yes	No	No	No

As nouns, bottle-tree is a hypernym of flame tree; that is, bottle-tree is a word with a broader meaning than flame tree:

flame tree: south Australian tree having panicles of brilliant scarlet flowers
bottle-tree: an Australian tree of the genus Brachychiton

Other hypernyms of flame tree include bottle tree.

As nouns, bottle-tree is a hypernym of flame tree; that is, bottle-tree is a word with a broader meaning than flame tree:

Other hypernyms of flame tree include bottle tree.

flame tree (noun)	bottle-tree (noun)
south Australian tree having panicles of brilliant scarlet flowers	an Australian tree of the genus Brachychiton
north Australian tree having white flowers and broad leaves
a terrestrial evergreen shrub or small tree of western Australia having brilliant yellow-orange flowers; parasitic on roots of grasses
showy tropical tree or shrub native to Madagascar; widely planted in tropical regions for its immense racemes of scarlet and orange flowers; sometimes placed in genus Poinciana
tropical American thorny shrub or small tree; fragrant yellow flowers used in making perfumery