/ Thesaurus / F Synonyms of fallout shelter Find synonyms for: Noun1. fallout shelter, shelterusage: a shelter to protect occupants from the fallout from an atomic bombWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: grimace Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language