nightmare nightman • nightmarish · · · Info · Definitions · Synonyms · Characters · · nightmare · · Text Latin · · Script 9 · · Length 2 · · Syllables Definitions · · · (noun) a situation resembling a terrifying dream. Synonyms: incubus. · · Noun Definition 1 (noun) a terrifying or deeply upsetting dream. · · Noun Definition 2 Synonyms · · · incubus · · Synonym 1 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 g latin small letter g U+0067 h latin small letter h U+0068 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E r latin small letter r U+0072 t latin small letter t U+0074