foxtail orchid vs orchid

foxtail orchid and orchid both are nouns.

Word	Noun	Adjective	Verb	Adverb
foxtail orchid	Yes	No	No	No
orchid	Yes	No	No	No

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

foxtail orchid: any of various orchids of the genus Rhyncostylis having pink- to purple-marked white flowers in a dense cylindrical raceme
orchid: any of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colors

Other hypernyms of foxtail orchid include orchidaceous plant.

foxtail orchid (noun)	orchid (noun)
any of various orchids of the genus Rhyncostylis having pink- to purple-marked white flowers in a dense cylindrical raceme	any of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colors