bletia vs orchid

bletia and orchid both are nouns.

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

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

bletia: any of various orchids of the genus Bletia having pseudobulbs and erect leafless racemes of large purple or pink flowers
orchid: any of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colors

Other hypernyms of bletia include orchidaceous plant.

bletia (noun)	orchid (noun)
any of various orchids of the genus Bletia having pseudobulbs and erect leafless racemes of large purple or pink flowers	any of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colors