Be obligatory
Be necessary and be obligatory are semantically related. In some cases you can use "Be necessary" instead a verb phrase "Be obligatory".
Be necessary
Be obligatory and be necessary are semantically related. You can use "Be obligatory" instead a verb phrase "Be necessary".
Mutual synonyms
Cite this Source
Be necessary and Be obligatory. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/be_obligatory/be_necessary
Be obligatory & Be necessary. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/be_obligatory/be_necessary>.
Be necessary or Be obligatory. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/be_obligatory/be_necessary.
Google Ngram Viewer shows how "be obligatory" and "be necessary" have occurred on timeline