Indispensable and Necessary

Indispensable

Indispensable adjective - Impossible to do without.
Usage example: fully aware that he was an indispensable assistant, he decided that it was high time that he be paid what he was worth

Necessary is a synonym for indispensable in essential topic. In some cases you can use "Necessary" instead the word "Indispensable" as an adjective or a noun, when it comes to topics like important, required. popular alternative

Nearby Word: indispensably

Necessary

Necessary adjective - Forcing one's compliance or participation by or as if by law.
Usage example: an emissions test is necessary before you can renew the registration for your car

Indispensable is a synonym for necessary in essential topic. You can use "Indispensable" instead an adjective "Necessary", if it concerns topics such as needed, important, required. popular alternative

Nearby Words: necessity, necessarily
Cite this Source
Necessary and Indispensable. (2016). Retrieved 2026, August 18, from https://thesaurus.plus/related/indispensable/necessary
Indispensable & Necessary. N.p., 2016. Web. 18 Aug. 2026. <https://thesaurus.plus/related/indispensable/necessary>.
Necessary or Indispensable. 2016. Accessed August 18, 2026. https://thesaurus.plus/related/indispensable/necessary.
Google Ngram Viewer shows how "indispensable" and "necessary" have occurred on timeline