Dubious
Dubious adjective - Giving good reason for being doubted, questioned, or challenged.
Doubtfully and dubious are semantically related. In some cases you can use "Doubtfully" instead an adverb "Dubious".
Doubtfully
Doubtfully adverb - With distrust.
Dubious and doubtfully are semantically related. Sometimes you can use "Dubious" instead an adverb "Doubtfully".
Mutual synonyms
Cite this Source
Doubtfully and Dubious. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/dubious/doubtfully
Dubious & Doubtfully. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/dubious/doubtfully>.
Doubtfully or Dubious. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/dubious/doubtfully.
Google Ngram Viewer shows how "dubious" and "doubtfully" have occurred on timeline