nerveroot vs slipper orchid

nerveroot and slipper orchid both are nouns.

Word	Noun	Adjective	Verb	Adverb
nerveroot	Yes	No	No	No
slipper orchid	Yes	No	No	No

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

nerveroot: once common rose pink woodland orchid of eastern North America
slipper orchid: any of several chiefly American wildflowers having an inflated pouchlike lip; difficult or impossible to cultivate in the garden

Other hypernyms of nerveroot include ladies' slipper, lady's-slipper, lady's slipper, lady-slipper, lady slipper.

nerveroot (noun)	slipper orchid (noun)
once common rose pink woodland orchid of eastern North America	any of several chiefly American wildflowers having an inflated pouchlike lip; difficult or impossible to cultivate in the garden