ladies' slipper vs slipper orchid

ladies' slipper and slipper orchid both are nouns.

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

As nouns, ladies' slipper and slipper orchid are synonyms defined as:

ladies' slipper and slipper orchid: any of several chiefly American wildflowers having an inflated pouchlike lip; difficult or impossible to cultivate in the garden

Other synonyms of ladies' slipper include lady's-slipper, lady's slipper, lady-slipper, lady slipper.

ladies' slipper (noun)	slipper orchid (noun)
any of several chiefly American wildflowers having an inflated pouchlike lip; difficult or impossible to cultivate in the garden	any of several chiefly American wildflowers having an inflated pouchlike lip; difficult or impossible to cultivate in the garden