Prince-of-Wales feather vs Prince-of-Wales plume

Prince-of-Wales feather and Prince-of-Wales plume both are nouns.

Word	Noun	Adjective	Verb	Adverb
Prince-of-Wales feather	Yes	No	No	No
Prince-of-Wales plume	Yes	No	No	No

As nouns, Prince-of-Wales feather and Prince-of-Wales plume are synonyms defined as:

Prince-of-Wales feather and Prince-of-Wales plume: New Zealand with pinnate fronds and a densely woolly stalks; sometimes included in genus Todea

Other synonyms of Prince-of-Wales feather include crape fern, Leptopteris superba, Prince-of-Wales fern, Todea superba.

Prince-of-Wales feather (noun)	Prince-of-Wales plume (noun)
New Zealand with pinnate fronds and a densely woolly stalks; sometimes included in genus Todea	New Zealand with pinnate fronds and a densely woolly stalks; sometimes included in genus Todea