Requisite
Requisite adjective - Impossible to do without.
Textbook and requisite are semantically related. In some cases you can use "Textbook" instead an adjective "Requisite".
Nearby Word: requisition
Textbook
Textbook adjective - Constituting, serving as, or worthy of being a pattern to be imitated.
Mutual synonyms
Cite this Source
Textbook and Requisite. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/requisite/textbook
Requisite & Textbook. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/requisite/textbook>.
Textbook or Requisite. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/requisite/textbook.
Google Ngram Viewer shows how "requisite" and "textbook" have occurred on timeline