| Word | Definitions | Synonyms |
|---|---|---|
| double | (adverb) to double the degree | Synonyms: doubly, twice |
| (adverb) two together | - | |
| (adverb) downward and forward | - | |
| doubly | (adverb) to double the degree | Synonyms: double, twice |
| (adverb) in a twofold manner | Synonyms: in two ways | |
| doubtfully | (adverb) in a doubtful manner | Synonyms: dubiously |
| doubtless | (adverb) without doubt; certainly | Synonyms: doubtlessly, undoubtedly |
| doubtlessly | (adverb) without doubt; certainly | Synonyms: doubtless, undoubtedly |