Added 9 October 2026 soapweed noun Categories: PlantsObscure Words noun ! Definition from WordNet 3.1, Princeton University. More about soapweed at Wordnik → Where our words come from → Tall arborescent yucca of southwestern United States. Origin From soap + weed. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: yuccamothskippermothsplantsseedlingssilkgrasssoaptreebeargrass Back to today's word