Bahia piassava vs feather palm

Bahia piassava and feather palm both are nouns.

Word	Noun	Adjective	Verb	Adverb
Bahia piassava	Yes	No	No	No
feather palm	Yes	No	No	No

As nouns, feather palm is a hypernym of Bahia piassava; that is, feather palm is a word with a broader meaning than Bahia piassava:

Bahia piassava: Brazilian palm yielding fibers used in making ropes, mats, and brushes
feather palm: palm having pinnate or featherlike leaves

Bahia piassava (noun)	feather palm (noun)
Brazilian palm yielding fibers used in making ropes, mats, and brushes	palm having pinnate or featherlike leaves