/ Thesaurus / S Synonyms of sodium thiosulphate Find synonyms for: Noun1. hypo, sodium thiosulphate, sodium thiosulfate, fixing agent, fixerusage: a compound used as a fixing agent in photographic developingWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: denizen Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language