waistband

English Thesaurus

1. a band of material around the waist that strengthens a skirt or trousers (noun.artifact)

hypernym	:	band,
definition	:	a thin flat strip of flexible material that is worn around the body or one of the limbs (especially to decorate the body) (noun.artifact)

hyponym	:	cummerbund,
definition	:	a broad pleated sash worn as formal dress with a tuxedo (noun.artifact)