Doubtfully
Doubtfully adverb - With distrust.
Questionable and doubtfully are semantically related. In some cases you can use "Questionable" instead an adverb "Doubtfully".
Questionable
Questionable adjective - Giving good reason for being doubted, questioned, or challenged.
Doubtfully and questionable are semantically related. Sometimes you can use "Doubtfully" instead an adverb "Questionable".
Mutual synonyms
Cite this Source
Questionable and Doubtfully. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/doubtfully/questionable
Doubtfully & Questionable. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/doubtfully/questionable>.
Questionable or Doubtfully. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/doubtfully/questionable.
Google Ngram Viewer shows how "doubtfully" and "questionable" have occurred on timeline