dreadfulness dreadfully • dreadingly · · · Info · Definitions · Synonyms · Characters · · dreadfulness · · Text Latin · · Script 12 · · Length Definitions · · · (noun) a quality of extreme unpleasantness. Synonyms: awfulness, horridness, terribleness. · · Noun Definition 1 Synonyms · · · awfulness · · Synonym 1 horridness · · Synonym 2 terribleness · · Synonym 3 Characters · · a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 f latin small letter f U+0066 l latin small letter l U+006C n latin small letter n U+006E r latin small letter r U+0072 s latin small letter s U+0073 u latin small letter u U+0075