regalia vs appurtenance

regalia and appurtenance both are nouns.

Word	Noun	Adjective	Verb	Adverb
regalia	Yes	No	No	No
appurtenance	Yes	No	No	No

As nouns, appurtenance is a hypernym of regalia; that is, appurtenance is a word with a broader meaning than regalia:

regalia: paraphernalia indicative of royalty (or other high office)
appurtenance: equipment consisting of miscellaneous articles needed for a particular operation or sport etc.

Other hypernyms of regalia include gear, paraphernalia.

regalia (noun)	appurtenance (noun)
paraphernalia indicative of royalty (or other high office)	a supplementary component that improves capability
especially fine or decorative clothing	equipment consisting of miscellaneous articles needed for a particular operation or sport etc.