6 letters · 13 points in Scrabble
noun American plant having spikes of blue flowers and growing in shallow water of streams and ponds
originPerhaps from a Native American language of the Carolinas such as Carolina Algonquian. If the name was originally applied to a white variety, it could be from the Algqonian root for "white": compare Massachusett wompi (“white”), whence English wamp and wampum.
Etymology from Wiktionary, CC BY-SA 3.0