saltpeter salt pansmith • saltpeter paper · · · Info · Definitions · Synonyms · Characters · · saltpeter · · Text Latin · · Script 9 · · Length 3 · · Syllables Definitions · · · (noun) (KNO3) used especially as a fertilizer and explosive. Synonyms: potassium nitrate, saltpetre, niter, nitre. · · Noun Definition 1 Synonyms · · · potassium nitrate · · Synonym 1 saltpetre · · Synonym 2 niter · · Synonym 3 nitre · · Synonym 4 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 l latin small letter l U+006C p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074