EFFECTIVENESS Synonyms: 60 Similar and Opposite Words

effectiveness

noun

Definition of effectiveness

as in conclusiveness

the capacity to persuade the "guilty" verdict was all the proof needed of the effectiveness of the prosecutor's closing argument

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

as in efficacy

the power to produce a desired result the huge upsurge in sales pretty much demonstrated the effectiveness of the new ad campaign

Synonyms & Similar Words

Antonyms & Near Antonyms

as in impact

the quality of an utterance that provokes interest and produces an effect your writing lacks effectiveness because practically every sentence is in the passive voice

Synonyms & Similar Words

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of effectiveness Despite concerns over data privacy and the rule’s effectiveness, the legislation received support in the General Assembly. — Kacen Bayless, Kansas City Star, 9 July 2026 The paper also describes ongoing research into each option's monitoring effectiveness. — Andrew Jones, Space.com, 9 July 2026 These dollars do not account for the long-term investment required to maintain the system’s effectiveness, the report said. — Lizzie Kane july 9, Sacbee.com, 9 July 2026 When organizational culture rewards availability over effectiveness, burnout follows. — Dr. Samantha Madhosingh, Forbes.com, 8 July 2026 Supporters cite research showing reductions in shootings in some neighborhoods, while critics have questioned its oversight and effectiveness. — Brian Carlton, Baltimore Sun, 8 July 2026 Phase 3 trials are conducted to confirm the effectiveness and further evaluate the overall risks and benefits of a new medication. — Camille Hoffman, The Conversation, 7 July 2026

Recent Examples of Synonyms for effectiveness

Noun

But his dictionary, with its conclusiveness, was a huge publishing success.

— Louis Menand, New Yorker, 22 Dec. 2025

Definition of conclusiveness

Noun

However, as the industry innovates with newer products such as high alcohol content beer or ready-to-drink cocktails, the efficacy of the categorical system continues to break down.

— Adam Hoffer, Chicago Tribune, 5 July 2026
Program planning needs to take into account the fun factor without losing efficacy.

— Matt Parrott, Arkansas Online, 5 July 2026

Definition of efficacy

Noun

Mexico’s World Cup run may be over, but for many Mexican Americans, its emotional impact endures.

— Alfredo Corchado, Los Angeles Times, 11 July 2026
Ship operators are favoring the Iranian route over the corridor along Oman’s coast, reinforcing the impact of the tanker attacks earlier this week, according to the trade intelligence firm Kpler.

— Spencer Kimball, CNBC, 10 July 2026

Definition of impact

Noun

In 2007, Pope Benedict XVI upheld the validity of the Latin Rite and urged priests to offer such a Mass if their parishioners demanded it.

— ABC News, ABC News, 3 July 2026
Looking forward, the exclusive use of domain data and task training also establishes the validity of bespoke DSLMs for complex, audited agentic work.

— Scott Zoldi, Forbes.com, 2 July 2026

Definition of validity

Noun

Smith’s grandmother, Angela Perdew, emphasized the importance of fireworks safety when speaking with WMC.

— Madison E. Goldberg, PEOPLE, 10 July 2026
Advertisement The first inkling of recalibration came when tech bros suddenly started emphasizing the importance of taste.

— Miranda Shanahan, Time, 10 July 2026

Definition of importance

Noun

But the strength of the rotation also depends on the conflict in the Middle East remaining contained.

— John Towfighi, CNN Money, 9 July 2026
But its ability to tolerate discomfort is its strength, particularly through its most original figure—Dahl’s friend and publisher Tom Maschler, deftly portrayed by Elliot Levey.

— Emily Nussbaum, New Yorker, 9 July 2026

Definition of strength

Noun

This concert will take place at Tottenham Hotspur Stadium and already has fans speculating whether Beyoncé might make an appearance given the significance of the date.

— Caché McClay, USA Today, 11 July 2026
The ceasefire framework explicitly designates Iran and Oman to negotiate the strategic waterway’s future management, giving Araghchi’s visit to Muscat particular significance.

— Rhea Mogul, CNN Money, 11 July 2026

Definition of significance

Noun

In October, authorities established a cemetery in the city of Deir al Balah to bury unidentified bodies recovered from around the enclave.

— Bilal Shbeir, Los Angeles Times, 9 July 2026
The board needs to establish the authority structure and time-to-execution for such scenarios.

— Anjana Susarla, Forbes.com, 9 July 2026

Definition of authority

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effectively

effectiveness

effects

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“Effectiveness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/effectiveness. Accessed 14 Jul. 2026.

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Synonyms of effectiveness

noun

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