Dead sure
Definitely and dead sure are semantically related. In some cases you can use "Definitely" instead an adverb phrase "Dead sure".
Definitely
Definitely adverb - Without any question.
Dead sure and definitely are semantically related. You can use "Dead sure" instead an adverb "Definitely".
Mutual synonyms
Cite this Source
Definitely and Dead sure. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/dead_sure/definitely
Dead sure & Definitely. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/dead_sure/definitely>.
Definitely or Dead sure. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/dead_sure/definitely.
Google Ngram Viewer shows how "dead sure" and "definitely" have occurred on timeline