- sodium carbonate, washing soda, sal soda, soda ash, soda - a sodium salt of carbonic acid; used in making soap powders and glass and paper
--1 is a kind of salt
- pop, soda, soda pop, soda water, tonic - a sweet drink containing carbonated water and flavoring; "in New England they call sodas tonics"
--2 is a kind of soft drink
--2 has substances:soda water, carbonated water, club soda, seltzer, sparkling water