Be effective
Exist and be effective are semantically related. In some cases you can use "Exist" instead a verb phrase "Be effective".
Exist
Exist verb - To have life.
Be effective and exist are semantically related. Sometimes you can use "Be effective" instead a verb "Exist".
Both terms in one sentence
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While it does work, and would undoubtedly be effective against even modern opponents, more advanced weapons technologies exist now and are available to them.
Source: Literature / Gate - Longevity treatments exist in the Mutant Chronicles setting, but between the astronomic expense, the invasive surgery and the extremely strict regimen of diet and exercise required for the treatment to be effective, very few people bother.
Source: Longevity Treatment
Cite this Source
Exist and Be effective. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/be_effective/exist
Be effective & Exist. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/be_effective/exist>.
Exist or Be effective. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/be_effective/exist.
Google Ngram Viewer shows how "be effective" and "exist" have occurred on timeline