Definitely and Doubtless

Definitely

Definitely adverb - Without any question.
Usage example: that is definitely the kind of dog we're looking to adopt

Doubtless is a synonym for definitely in certainly topic. In some cases you can use "Doubtless" instead an adverb "Definitely", when it comes to topics like undeniably, surely, undoubtedly.

Doubtless

Doubtless adverb - Without any question.
Usage example: she is doubtless the one and only girl for me

Definitely is a synonym for doubtless in absolutely topic. You can use "Definitely" instead an adverb "Doubtless", if it concerns topics such as certainly, undeniably, surely, undoubtedly.

Nearby Words: doubt, doubtful, doubtlessly
Cite this Source
Doubtless and Definitely. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/definitely/doubtless
Definitely & Doubtless. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/definitely/doubtless>.
Doubtless or Definitely. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/definitely/doubtless.
Google Ngram Viewer shows how "definitely" and "doubtless" have occurred on timeline