helmet orchid vs orchid

helmet orchid and orchid both are nouns.

Word	Noun	Adjective	Verb	Adverb
helmet orchid	Yes	No	No	No
orchid	Yes	No	No	No

As nouns, orchid is a hypernym of helmet orchid; that is, orchid is a word with a broader meaning than helmet orchid:

helmet orchid: any of several orchids of the genus Coryanthes having racemes of a few musky-scented waxy flowers with a helmet-shaped lip process
orchid: any of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colors

Other hypernyms of helmet orchid include orchidaceous plant.

As nouns, orchid is a hypernym of helmet orchid; that is, orchid is a word with a broader meaning than helmet orchid:

helmet orchid: any of numerous orchids of the genus Pterostylis having leaves in a basal rosette and green flowers often striped purple or brown or red with the dorsal sepal incurved to form a hood
orchid: any of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colors

Other hypernyms of helmet orchid include orchidaceous plant.

helmet orchid (noun)	orchid (noun)
any of several orchids of the genus Coryanthes having racemes of a few musky-scented waxy flowers with a helmet-shaped lip process	any of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colors
any of numerous orchids of the genus Pterostylis having leaves in a basal rosette and green flowers often striped purple or brown or red with the dorsal sepal incurved to form a hood