cummerbund vs waistband

cummerbund and waistband both are nouns.

Word	Noun	Adjective	Verb	Adverb
cummerbund	Yes	No	No	No
waistband	Yes	No	No	No

As nouns, waistband is a hypernym of cummerbund; that is, waistband is a word with a broader meaning than cummerbund:

cummerbund: a broad pleated sash worn as formal dress with a tuxedo
waistband: a band of material around the waist that strengthens a skirt or trousers

Other hypernyms of cummerbund include cincture, girdle, sash, waistcloth.

cummerbund (noun)	waistband (noun)
a broad pleated sash worn as formal dress with a tuxedo	a band of material around the waist that strengthens a skirt or trousers