Question marks
Unknowns and question marks are semantically related. In some cases you can use "Unknowns" instead a noun phrase "Question marks".
Unknowns
Question marks and unknowns are semantically related. Sometimes you can use "Question marks" instead a noun "Unknowns".
Cite this Source
Unknowns and Question marks. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/question_marks/unknowns
Question marks & Unknowns. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/question_marks/unknowns>.
Unknowns or Question marks. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/question_marks/unknowns.
Google Ngram Viewer shows how "question marks" and "unknowns" have occurred on timeline