honey locust vs genus Gleditsia

honey locust and genus Gleditsia both are nouns.

Word	Noun	Adjective	Verb	Adverb
honey locust	Yes	No	No	No
genus Gleditsia	Yes	No	No	No

honey locust (noun)	genus Gleditsia (noun)
tall usually spiny North American tree having small greenish-white flowers in drooping racemes followed by long twisting seed pods; yields very hard durable reddish-brown wood; introduced to temperate Old World	deciduous trees: honey locusts