caustic soda caustic remark • caustification · · · Info · Definitions · Synonyms · Characters · · caustic soda · · Text Common · · Latin · · Scripts 12 · · Length 5 · · Syllables Definitions · · · (noun) a strongly alkaline caustic used in manufacturing soap and paper and aluminum and various sodium compounds. Synonyms: sodium hydroxide, caustic soda. · · Noun Definition 1 Synonyms · · · sodium hydroxide · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 d latin small letter d U+0064 i latin small letter i U+0069 o latin small letter o U+006F s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075