Certainly
Certainly adverb - Without any question.
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Synonyms for Certainly
Extensively and certainly are semantically related. In some cases you can use "Extensively" instead an adverb "Certainly".
Extensively
Extensively adverb - To a large extent or degree.
Certainly and extensively are semantically related. Sometimes you can use "Certainly" instead an adverb "Extensively".
Mutual synonyms
Both words in one sentence
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Roaring Rampage of Revenge: Veronica considers this after regaining her memories of being wronged by Po Xu-Ke's nephews, but decides against it after (extensively) calculating that while she has a fairly good chance of achieving her objective, she would certainly not survive the process.
Source: Webcomic / Quantum Vibe
Cite this Source
Extensively and Certainly. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/certainly/extensively
Certainly & Extensively. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/certainly/extensively>.
Extensively or Certainly. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/certainly/extensively.
Google Ngram Viewer shows how "certainly" and "extensively" have occurred on timeline