Synonyms for doubtless
- adverb
- adjective
Most common
All synonyms
Adverb
certainly, undoubtedly, doubtlessly, indisputably, unquestionably, indubitably, undoubtably, positively, assuredly, undeniably
Adjective
Definitions
- adv. 1
Without doubt; certainly; definitely; very probably, in all likelihood; doubtlessly.
- adj. 1
Characterized by or experiencing no doubt at all, certain; undoubted; undoubting.
Related words
- Word family
- doubtlessly
Example sentences
- certainly At that time the snow plow was certainly our hero.
- undoubtedly This is undoubtedly the best country in the world.
- indisputably Romanian is indisputably a difficult language.
Popularity over time
| Word | 1850 → 2019 | Trend |
|---|---|---|
| doubtless | falling | |
| certainly | steady | |
| undoubtedly | falling | |
| indisputably | steady | |
| doubtlessly | falling |
Use in printed books, per decade from 1850 to 2019.
By length
- 7 letters
- certain2
- 9 letters
- certainly3, assuredly4, undoubted3
- 10 letters
- positively4, undeniably5
- 11 letters
- undoubtedly4, indubitably, doubtlessly, undoubtably
- 12 letters
- indisputably5
- 13 letters
- unquestioning4
- 14 letters
- unquestionably5
The small number after each word is its number of syllables (certain2 = 2 syllables).