Adam's apple vs Tabernaemontana

Adam's apple and Tabernaemontana both are nouns.

Word	Noun	Adjective	Verb	Adverb
Adam's apple	Yes	No	No	No
Tabernaemontana	Yes	No	No	No

Adam's apple (noun)	Tabernaemontana (noun)
the largest cartilage of the larynx	evergreen tropical trees and shrubs with milky sap
tropical shrub having glossy foliage and fragrant nocturnal flowers with crimped or wavy corollas; northern India to Thailand