/ Thesaurus / P Synonyms of purple loosestrife Find synonyms for: Noun1. purple loosestrife, spiked loosestrife, Lythrum salicaria, loosestrifeusage: marsh herb with a long spike of purple flowers; originally of Europe but now rampant in eastern United StatesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language