Effective
Effective adjective - Producing or capable of producing a desired result.
Most important and effective are semantically related In some cases you can use "Most important" instead an adjective "Effective".
Most important
Effective and most important are semantically related in eminent topic. Sometimes you can use "Effective" instead an adjective phrase "Most important".
Mutual synonyms
Both terms in one sentence
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First, the father of the twelve-year-old Duke of Elath dies a natural death of age, and Elodie has to determine who becomes effective regent for one of the most important duchies in Nova.
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And because two of his most important moves his Launcher and his Dragon's Touch are only effective on standing enemies, he can't effectively damage airborne fighters even after he catches them.
Source: Crippling Overspecialization - It IS an effective, terrifying threat, except Zaphod steps into it...inside a virtual copy of the universe created just for him, so it merely reaffirms his personal view that he is the most important being in the entire universe.
Source: Maximum Fun Chamber
Cite this Source
Most important and Effective. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/effective/most_important
Effective & Most important. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/effective/most_important>.
Most important or Effective. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/effective/most_important.
Google Ngram Viewer shows how "effective" and "most important" have occurred on timeline