Essential
Essential adjective - Impossible to do without.
Sustentive and essential are semantically related. In some cases you can replace term "Sustentive" with "Essential", this adjectives are similar.
Sustentive
Essential and sustentive are semantically related. You can use "Essential" instead an adjective "Sustentive".
Mutual synonyms
Cite this Source
Sustentive and Essential. (2016). Retrieved 2026, August 10, from https://thesaurus.plus/related/essential/sustentive
Essential & Sustentive. N.p., 2016. Web. 10 Aug. 2026. <https://thesaurus.plus/related/essential/sustentive>.
Sustentive or Essential. 2016. Accessed August 10, 2026. https://thesaurus.plus/related/essential/sustentive.
Google Ngram Viewer shows how "essential" and "sustentive" have occurred on timeline