washing soda washing powder • washington · · · Info · Definitions · Synonyms · Characters · · washing soda · · Text Common · · Latin · · Scripts 12 · · Length 4 · · Syllables Definitions · · · (noun) a sodium salt of carbonic acid; used in making soap powders and glass and paper. Synonyms: sodium carbonate, washing soda, sal soda, soda ash, soda. · · Noun Definition 1 Synonyms · · · sodium carbonate · · Synonym 1 sal soda · · Synonym 2 soda ash · · Synonym 3 soda · · Synonym 4 Characters · · space U+0020 a latin small letter a U+0061 d latin small letter d U+0064 g latin small letter g U+0067 h latin small letter h U+0068 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F s latin small letter s U+0073 w latin small letter w U+0077