booster

noun

ˈbü-stər How to pronounce booster (audio)
Definition of boosternext
as in proponent
a person who actively supports or favors a cause rah-rah boosters for the sports team will be attending the game and carrying large signs

Synonyms & Similar Words

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Antonyms & Near Antonyms

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 booster The giant rockets have an upper-stage Starship and lower-stage booster. — Brandon Lingle, San Antonio Express-News, 15 Oct. 2026 While SpaceX has successfully recovered a trio of Super Heavy boosters using the mechanical arms of its Starbase launch tower, the company has yet to return a Starship upper stage to its launch site under its own power. — Josh Dinner, Space.com, 14 Oct. 2026 Shortly after the Chinese aerospace company LandSpace launched a rocket in northwestern China, its booster—the part needed to thrust the rocket into orbit—successfully detached and landed back on earth. — Kathleen Curlee, Foreign Affairs, 14 Oct. 2026 As the first-stage booster separated from the cargo Dragon spacecraft, the light show began unfolding not only over the Space Coast, but for those who looked skyward hundreds of miles away. — Richard Tribou, The Orlando Sentinel, 13 Oct. 2026 See All Example Sentences for booster
Recent Examples of Synonyms for booster
  1. proponent
  2. supporter
  3. advocate
  4. advocator
  5. exponent
  6. promoter
Noun
  • The billionaire tax fight grew more contentious last month after the lead proponent of the measure, SEIU UHW President Dave Regan, was accused of harassing female colleagues and threatening other union leaders to urge them to back the measure.
    — ABC News, ABC News, 9 Oct. 2026
  • The biggest proponent of Proposition NN is the Colorado Education Association, the state's largest teachers' union.
    — Shaun Boyd, CBS News, 8 Oct. 2026
Definition of proponent
Noun
  • Even some supporters of capital punishment, including a number of Republican lawmakers, seemed repelled by the prospect.
    — Amy Davidson Sorkin, New Yorker, 16 Oct. 2026
  • The bottom line of Milton Friedman and other supporters of neoliberalism was that there has to be effective competition, there has to be open entry.
    — John E. McDonough, STAT, 16 Oct. 2026
Definition of supporter
Noun
  • However, some safety advocates and Senator Maria Cantwell want a stronger federal review process.
    — Aamir Khollam, Interesting Engineering, 17 Oct. 2026
  • The city’s independent ratepayer advocate, Timothy O’Connor, agreed that high temperatures were a big driver of the skyrocketing bills, with more people moving into Tier 2 and Tier 3.
    — Los Angeles Times, Los Angeles Times, 17 Oct. 2026
Definition of advocate
Noun
  • In the leadership and care phase, your role is that of an advocator.
    — Rodney C. Adkins, Forbes.com, 19 May 2026
Definition of advocator
Noun
  • Grupo Duelo, one of the most prominent exponents of norteño tejano music, will be part of the Billboard Latin Music Week 2026, representing traditional regional Mexican music.
    — Tere Aguilera, Billboard, 9 Oct. 2026
  • Scientists have sought a way to shrink the size of the exponent.
    — Joseph Howlett, Scientific American, 8 Oct. 2026
Definition of exponent
Noun
  • Last year, the company dipped its toes into the live events world, serving as the promoter for boy group P1Harmony’s tour — the boy group is slated to perform Saturday at 82World.
    — Nicole Fell, HollywoodReporter, 16 Oct. 2026
  • Before long, a promoter recruited her for his stable of touring female wrestlers.
    — Leslie Camhi, New Yorker, 16 Oct. 2026
Definition of promoter

Browse Nearby Words

boosted
booster
boosters
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Cite this Entry

“Booster.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/booster. Accessed 20 Oct. 2026.

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