Platanthera bifolia vs orchid

Platanthera bifolia and orchid both are nouns.

Word	Noun	Adjective	Verb	Adverb
Platanthera bifolia	Yes	No	No	No
orchid	Yes	No	No	No

As nouns, orchid is a hypernym of Platanthera bifolia; that is, orchid is a word with a broader meaning than Platanthera bifolia:

Platanthera bifolia: south European orchid having fragrant greenish-white flowers; sometimes placed in genus Habenaria
orchid: any of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colors

Other hypernyms of Platanthera bifolia include orchidaceous plant.

Platanthera bifolia (noun)	orchid (noun)
south European orchid having fragrant greenish-white flowers; sometimes placed in genus Habenaria	any of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colors