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
Mandatory is a synonym for indispensable in essential topic. In some cases you can use "Mandatory" instead an adjective "Indispensable", when it comes to topics like required. popular alternative
Nearby Word: indispensably
Mandatory
Mandatory adjective - Forcing one's compliance or participation by or as if by law.
Usage example: the tests are mandatory for all students wishing to graduate
Indispensable is a synonym for mandatory in necessary topic. You can use "Indispensable" instead an adjective "Mandatory", if it concerns topics such as required. popular alternative
Mutual synonyms
Related pairs
- involuntary and indispensable
- involuntary and mandatory
- binding and indispensable
- binding and mandatory
- needed and indispensable
- needed and mandatory
- important and indispensable
- important and mandatory
- necessary and indispensable
- necessary and mandatory
- essential and indispensable
- essential and mandatory
- required and indispensable
- required and mandatory
Both words in one sentence
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Despite not being "heroes" per se, Shinigami are indispensable to the plot; they are neither permitted nor capable of sexual relationships with one another or with humans, so their celibacy is somewhat mandatory.
Source: Celibate Hero
Cite this Source
Mandatory and Indispensable. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/indispensable/mandatory
Indispensable & Mandatory. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/indispensable/mandatory>.
Mandatory or Indispensable. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/indispensable/mandatory.
Google Ngram Viewer shows how "indispensable" and "mandatory" have occurred on timeline