nerveroot vs lady slipper

nerveroot and lady slipper both are nouns.

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

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

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

nerveroot (noun)	lady 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