nerveroot vs lady's-slipper

nerveroot and lady's-slipper both are nouns.

Word	Noun	Adjective	Verb	Adverb
nerveroot	Yes	No	No	No
lady's-slipper	Yes	No	No	No

As nouns, lady's-slipper is a hypernym of nerveroot; that is, lady's-slipper is a word with a broader meaning than nerveroot:

nerveroot: once common rose pink woodland orchid of eastern North America
lady's-slipper: 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-slipper, lady slipper, slipper orchid.

nerveroot (noun)	lady's-slipper (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