pansy orchid vs orchid

pansy orchid and orchid both are nouns.

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

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

pansy orchid: any of various orchids of the genus Miltonia having solitary or loosely racemose showy broadly spreading flowers
orchid: any of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colors

Other hypernyms of pansy orchid include orchidaceous plant.

pansy orchid (noun)	orchid (noun)
any of various orchids of the genus Miltonia having solitary or loosely racemose showy broadly spreading flowers	any of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colors