/ Thesaurus / G Synonyms of great grandfather Find synonyms for: Noun1. great grandfather, great grandparentusage: a father of your grandparentWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: winsome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language