/ Thesaurus / S Synonyms of spendthrift trust Find synonyms for: Noun1. spendthrift trust, trustusage: a trust created to maintain a beneficiary but to be secure against the beneficiary's improvidenceWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: effervescent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language