/ Thesaurus / S Synonyms of spontaneous abortion Find synonyms for: Noun1. spontaneous abortion, miscarriage, stillbirth, abortionusage: a natural loss of the products of conceptionWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: acerbity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language