thundercloud thunderclap • thundercrack · · · Info · Definitions · Synonyms · Characters · · thundercloud · · Text Latin · · Script 12 · · Length Definitions · · · (noun) a dark cloud of great vertical extent charged with electricity; associated with thunderstorms. Synonyms: cumulonimbus, cumulonimbus cloud. · · Noun Definition 1 Synonyms · · · cumulonimbus · · Synonym 1 cumulonimbus cloud · · Synonym 2 Characters · · c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 h latin small letter h U+0068 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074 u latin small letter u U+0075