| Word | Definitions | Synonyms |
|---|---|---|
| dubiously | (adverb) in a doubtful manner | Synonyms: doubtfully |
| (adverb) in a questionable and dubious manner | Synonyms: questionably | |
| indubitably | (adverb) in a manner or to a degree that could not be doubted | Synonyms: beyond a doubt, beyond a shadow of a doubt, beyond doubt |