Necessity
Necessity noun - Something necessary, indispensable, or unavoidable.
Obligation is a synonym for necessity in need topic. In some cases you can use "Obligation" instead a noun "Necessity", when it comes to topics like force of circumstance.
Obligation
Obligation noun - Something one must do because of prior agreement.
Necessity is a synonym for obligation in responsibility topic. You can use "Necessity" instead a noun "Obligation", if it concerns topics such as duty, need.
Mutual synonyms
Related pairs
- compulsion and necessity
- compulsion and obligation
- duty and necessity
- duty and obligation
- need and necessity
- need and obligation
- demand and necessity
- demand and obligation
- call and necessity
- call and obligation
- stipulation and necessity
- stipulation and obligation
- pressure and necessity
- pressure and obligation
How words are described
Both words in one sentence
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She also abides by most traditional maternal roles, though she does so out of duty and obligation, rather than necessity.
Source: Chubby Mama, Skinny Papa
Cite this Source
Obligation and Necessity. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/necessity/obligation
Necessity & Obligation. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/necessity/obligation>.
Obligation or Necessity. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/necessity/obligation.
Google Ngram Viewer shows how "necessity" and "obligation" have occurred on timeline