Doubtless and Definitely

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. In some cases you can use "Definitely" instead an adverb "Doubtless", when it comes to topics like certainly, undeniably, surely, undoubtedly.

Nearby Words: doubt, doubtful, doubtlessly

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. You can use "Doubtless" instead an adverb "Definitely", if it concerns topics such as undeniably, surely, undoubtedly.

Cite this Source
Definitely and Doubtless. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/doubtless/definitely
Doubtless & Definitely. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/doubtless/definitely>.
Definitely or Doubtless. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/doubtless/definitely.
Google Ngram Viewer shows how "doubtless" and "definitely" have occurred on timeline