nerveroot vs ladies' slipper

nerveroot and ladies' slipper both are nouns.

Word	Noun	Adjective	Verb	Adverb
nerveroot	Yes	No	No	No
ladies' slipper	Yes	No	No	No

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

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

nerveroot (noun)	ladies' 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