/ Thesaurus / B Synonyms of basking shark Find synonyms for: Noun1. basking shark, Cetorhinus maximus, mackerel sharkusage: large harmless plankton-eating northern shark; often swims slowly or floats at the sea surfaceWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language