twayblade vs orchidaceous plant

twayblade and orchidaceous plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
twayblade	Yes	No	No	No
orchidaceous plant	Yes	No	No	No

As nouns, orchidaceous plant is a hypernym of twayblade; that is, orchidaceous plant is a word with a broader meaning than twayblade:

twayblade: orchid having a pair of ovate leaves and a long slender raceme of green flowers sometimes tinged red-brown; Europe to central Asia
orchidaceous plant: any of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colors

Other hypernyms of twayblade include orchid.

As nouns, orchidaceous plant is a hypernym of twayblade; that is, orchidaceous plant is a word with a broader meaning than twayblade:

twayblade: an orchid of the genus Liparis having a pair of leaves
orchidaceous plant: any of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colors

Other hypernyms of twayblade include orchid.

twayblade (noun)	orchidaceous plant (noun)
orchid having a pair of ovate leaves and a long slender raceme of green flowers sometimes tinged red-brown; Europe to central Asia	any of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colors
an orchid of the genus Liparis having a pair of leaves