early purple orchid vs orchis

early purple orchid and orchis both are nouns.

Word	Noun	Adjective	Verb	Adverb
early purple orchid	Yes	No	No	No
orchis	Yes	No	No	No

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

early purple orchid: Eurasian orchid with showy pink or purple flowers in a loose spike
orchis: any of various deciduous terrestrial orchids having fleshy tubers and flowers in erect terminal racemes

early purple orchid (noun)	orchis (noun)
Eurasian orchid with showy pink or purple flowers in a loose spike	one of the two male reproductive glands that produce spermatozoa and secrete androgens
	any of various deciduous terrestrial orchids having fleshy tubers and flowers in erect terminal racemes