sour gum sour grass • sour-gum family · · · Info · Definitions · Synonyms · Characters · · sour gum · · Text Common · · Latin · · Scripts 8 · · Length 2 · · Syllables Definitions · · · (noun) columnar tree of eastern North America having horizontal limbs and small leaves that emerge late in spring and have brilliant color in early fall. Synonyms: sour gum, black gum, pepperidge, Nyssa sylvatica. · · Noun Definition 1 Synonyms · · · black gum · · Synonym 1 pepperidge · · Synonym 2 nyssa sylvatica · · Synonym 3 Characters · · space U+0020 g latin small letter g U+0067 m latin small letter m U+006D o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 u latin small letter u U+0075