tonka bean vs bean tree

tonka bean and bean tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
tonka bean	Yes	No	No	No
bean tree	Yes	No	No	No

As nouns, bean tree is a hypernym of tonka bean; that is, bean tree is a word with a broader meaning than tonka bean:

tonka bean: tall tropical South American tree having pulpy egg-shaped pods of fragrant black almond-shaped seeds used for flavoring
bean tree: any of several trees having seedpods as fruits

tonka bean (noun)	bean tree (noun)
tall tropical South American tree having pulpy egg-shaped pods of fragrant black almond-shaped seeds used for flavoring	any of several trees having seedpods as fruits
fragrant black nutlike seeds of the tonka bean tree; used in perfumes and medicines and as a substitute for vanilla