| English | Synonym |
|---|---|
| dreadful adjective | alarmingadjective badadjective unpleasantadjective |
| dreadfully adverb | awfullyadverb dismallyadverb horriblyadverb |
| dreadfulness noun | awfulnessnoun horridnessnoun terriblenessnoun unpleasantnessnoun |
| penny dreadful noun | dime novelnoun novelnoun |