/ Thesaurus / F Synonyms of factor of safety Find synonyms for: Noun1. safety factor, factor of safety, ratiousage: the ratio of the breaking stress of a structure to the estimated maximum stress in ordinary useWordNet 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