BOOSTER Synonyms: 44 Similar and Opposite Words

booster

noun

ˈbü-stər

Definition of booster

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

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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 After launch, the glide vehicle separates from the rocket booster and travels through the atmosphere at speeds above Mach 5 while making course adjustments. — Prabhat Ranjan Mishra, Interesting Engineering, 5 Aug. 2026 While boosters seek to help their favorite team recruit top players and win championships, MMRs are not aligned with any particular school and simply want to turn a profit. — Michael McCann, Sportico.com, 5 Aug. 2026 Future tests could include trying to use giant arms at its Starbase launching site in Texas to grab the rocket and its booster upon its hovering return to earth. — Bernard Condon, Fortune, 4 Aug. 2026 Since then, nearly 70 spacecraft and spent boosters have soft landed or crash landed on the moon—including six ships carrying people. — Jeffrey Kluger, Time, 4 Aug. 2026 See All Example Sentences for booster

Recent Examples of Synonyms for booster

Noun

But lawmakers appear to be turning to the provisions as a means of transitioning away from that model and toward what proponents, including Netanyahu, describe as a mutually beneficial defense partnership.

— Miranda Jeyaretnam, Time, 6 Aug. 2026
Although proponents say the substances help with weight loss, energy and muscle mass, and often cite research that has been done solely on animals or on a very small number of humans, no one knows for certain how or when it should be used in humans.

— Los Angeles Times, Los Angeles Times, 6 Aug. 2026

Definition of proponent

Noun

Even her supporters glance askance at one another during her rambling entreaties.

— Erik Kain, Forbes.com, 10 Aug. 2026
Cliven Bundy, the family patriarch, rallied hundreds of supporters to block the roundup of his cattle, sparking a days long armed standoff between law enforcement and the Bundy group near the town of Bunkerville, outside of Las Vegas.

— Andrew Graham, Sacbee.com, 9 Aug. 2026

Definition of supporter

Noun

When the lottery was proposed, advocates promised profits would go to aid education.

— Sun Sentinel Editorial Board, Sun Sentinel, 9 Aug. 2026
Senate Republicans have expressed wariness in recent days about the prospect of slashing those standards, which advocates say help keep kids safe and healthy.

— Zachary Schermele, USA Today, 9 Aug. 2026

Definition of advocate

Noun

His mind didn’t go blank; rather, all the what-ifs multiplied like exponents, crowding his thoughts and rendering him unable to envision anything else.

— Min Jin Lee, New Yorker, 19 July 2026
Often categorized along with Bellow and Bernard Malamud as exponents of a particularly Jewish-American sensibility, all three were additionally masters of the American voice.

— Literary Hub, Literary Hub, 4 June 2026

Definition of exponent

Noun

The idea sometimes asserted by promoters that asset protection planning can allow a person to decrease their insurance coverage is false.

— Jay Adkisson, Forbes.com, 11 Aug. 2026
Those recommendations can expose investors to steep losses, particularly when promoters use their audiences to inflate a token's price before selling their own holdings, a practice commonly known as a pump-and-dump scheme.

— Zachary Bynum, CBS News, 5 Aug. 2026

Definition of promoter

Browse Nearby Words

boosted

booster

boosters

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“Booster.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/booster. Accessed 13 Aug. 2026.

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Synonyms of booster

noun

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