Certainly
Certainly adverb - Without any question.
Usage example: certainly, you can come to the party
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Synonyms for Certainly
Undoubtedly is a synonym for certainly in definitely topic. In some cases you can use "Undoubtedly" instead an adverb "Certainly", when it comes to topics like certain, unquestionably, undeniably, surely. popular alternative
Undoubtedly
Undoubtedly adverb - Without any question.
Usage example: we will undoubtedly have to do some editing of our home video
Show all Definitions
Synonyms for Undoubtedly
Certainly is a synonym for undoubtedly in certain topic. You can use "Certainly" instead an adverb "Undoubtedly", if it concerns topics such as definitely, unequivocally, undeniably, surely. popular alternative
Nearby Word: undoubted
Mutual synonyms
Related pairs
- really and certainly
- really and undoubtedly
- truly and certainly
- truly and undoubtedly
- absolutely and certainly
- absolutely and undoubtedly
- sure and certainly
- sure and undoubtedly
- positively and certainly
- positively and undoubtedly
- definitely and certainly
- definitely and undoubtedly
- indeed and certainly
- indeed and undoubtedly
Both words in one sentence
- While Leela is certainly the most sensible of the crew, Fry is undoubtedly the kindest most moral character on the show.
Source: Women Are Wiser -
A Hedonistic subtype, with a modest amount of Visionary mixed in, though he is undoubtedly insane, he certainly makes no attempt at claiming that he didn't know what he was doing.
Source: Literature / Dark Future -
Enterprise almost certainly would have won, but in doing so would have kicked off a war between the two powers (undoubtedly the conspirators' plan).
Cite this Source
Undoubtedly and Certainly. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/certainly/undoubtedly
Certainly & Undoubtedly. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/certainly/undoubtedly>.
Undoubtedly or Certainly. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/certainly/undoubtedly.
Google Ngram Viewer shows how "certainly" and "undoubtedly" have occurred on timeline