green adder's mouth vs orchid

green adder's mouth and orchid both are nouns.

Word	Noun	Adjective	Verb	Adverb
green adder's mouth	Yes	No	No	No
orchid	Yes	No	No	No

As nouns, orchid is a hypernym of green adder's mouth; that is, orchid is a word with a broader meaning than green adder's mouth:

green adder's mouth: North American orchid having a solitary leaf and flowers with threadlike petals
orchid: any of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colors

Other hypernyms of green adder's mouth include orchidaceous plant.

green adder's mouth (noun)	orchid (noun)
North American orchid having a solitary leaf and flowers with threadlike petals	any of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colors