adam-and-eve vs orchid

adam-and-eve and orchid both are nouns.

Word	Noun	Adjective	Verb	Adverb
adam-and-eve	Yes	No	No	No
orchid	Yes	No	No	No

As nouns, orchid is a hypernym of adam-and-eve; that is, orchid is a word with a broader meaning than adam-and-eve:

adam-and-eve: North American orchid bearing a single leaf and yellowish-brown flowers
orchid: any of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colors

Other hypernyms of adam-and-eve include orchidaceous plant.

adam-and-eve (noun)	orchid (noun)
North American orchid bearing a single leaf and yellowish-brown flowers	any of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colors