Doubtfully and Rigorously
Opposite meaning words
Doubtfully
Rigorously
Rigorously adverb - In a rigorous manner.
Cite this Source
Rigorously and Doubtfully. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/doubtfully/rigorously
Doubtfully & Rigorously. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/doubtfully/rigorously>.
Rigorously or Doubtfully. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/doubtfully/rigorously.
Google Ngram Viewer shows how "doubtfully" and "rigorously" have occurred on timeline