purple orchis vs showy orchis

purple orchis and showy orchis both are nouns.

Word	Noun	Adjective	Verb	Adverb
purple orchis	Yes	No	No	No
showy orchis	Yes	No	No	No

As nouns, purple orchis and showy orchis are synonyms defined as:

purple orchis and showy orchis: North American orchid having a spike of violet-purple flowers mixed with white; sepals and petals form a hood

Other synonyms of purple orchis include Orchis spectabilis, purple-hooded orchis.

purple orchis (noun)	showy orchis (noun)
North American orchid having a spike of violet-purple flowers mixed with white; sepals and petals form a hood	North American orchid having a spike of violet-purple flowers mixed with white; sepals and petals form a hood