/ Thesaurus / F Synonyms of fraternal twin Find synonyms for: Noun1. fraternal twin, dizygotic twin, twinusage: either of two twins who developed from two separate fertilized eggsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language