caladenia vs orchid

caladenia and orchid both are nouns.

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

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

caladenia: any of various orchids of the genus Caladenia
orchid: any of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colors

Other hypernyms of caladenia include orchidaceous plant.

caladenia (noun)	orchid (noun)
any of various orchids of the genus Caladenia	any of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colors