Albizia lebbeck vs albizia

Albizia lebbeck and albizia both are nouns.

Word	Noun	Adjective	Verb	Adverb
Albizia lebbeck	Yes	No	No	No
albizia	Yes	No	No	No

As nouns, albizia is a hypernym of Albizia lebbeck; that is, albizia is a word with a broader meaning than Albizia lebbeck:

Albizia lebbeck: large spreading Old World tree having large leaves and globose clusters of greenish-yellow flowers and long seed pods that clatter in the wind
albizia: any of numerous trees of the genus Albizia

Other hypernyms of Albizia lebbeck include albizzia.

Albizia lebbeck (noun)	albizia (noun)
large spreading Old World tree having large leaves and globose clusters of greenish-yellow flowers and long seed pods that clatter in the wind	any of numerous trees of the genus Albizia