Synonyms for Soda (same or very similar meaning)
WordNet sense 1 (a sodium salt of carbonic acid; used in making soap powders and glass and paper):
sodium carbonate, sal soda, soda ash, washing sodaWordNet sense 2 (a sweet drink containing carbonated water and flavoring):
pop, tonic, soda water, soda popFrom the ODE community, based on WordNetadd/edit