- Definitions|2
- Thesaurus|642
- Abbreviations|0
29 entries under adverb topic. ×
| dubious(adjective, clear, honest, doubtful) | |
| uncertain(adjective, indefinite, unmistakably, perceptibly) | |
| unlikely(adjective, indefinite, unmistakably, possibly) | |
| questionable | |
| indefinite(adjective, unmistakably, authentically, indisputably) | |
| doubtedly | |
| improbably | |
| absurdly | |
| amazingly | |
| believably | |
| credibly | |
| doubted | |
| faithfully | |
| implausibly | |
| incredibly | |
| likely | |
| maybe | |
| perhaps | |
| persuasively | |
| plausibly |
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| APA | Smart Define. (2015). doubtless thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/doubtless/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "doubtless thesaurus" https://smartdefine.org/doubtless/thesaurus/antonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, doubtless thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/doubtless/thesaurus/antonyms>. |
| MLA | Smart Define. "doubtless thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/doubtless/thesaurus/antonyms> |