/ Thesaurus / F Synonyms of fish joint Find synonyms for: Noun1. fish joint, butt joint, buttusage: a butt joint formed by bolting fish plates to the sides of two rails or beamsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language