Find Antonyms

booster Antonyms

Opposite of booster

Because the opposite of booster shifts with each meaning, the antonyms and opposite words below are separated across 2 exact definitions and ranked by contrast strength.
JUMP TO:

• noun (Context 1)

An auxiliary rocket engine, amplifier, or mechanical device used to provide initial thrust, extra power, or increased signal strength.

Usage Example

"The spacecraft's solid-fuel boosters detached cleanly two minutes after liftoff."

Strong
attenuator
dampener

• noun (Context 2)

An enthusiastic supporter, promoter, or fundraising backer of a school, sports team, town, or organization.

Usage Example

"The high school athletic boosters raised enough money to purchase new uniforms for the track team."

Strongest
detractor
Strong
critic
opponent
naysayer

Similar words to booster

Words similar to booster shift depending on context. Common synonyms include:

booster dose
booster shot
booster seat
supporter
promoter
advocate
backer
amplifier
See all synonyms of booster

• Nearby Words

boorish
boorishly
boost
booster
boot
bootable
bootcut

Cite this Entry

Wordmom. (2026). Antonyms for Booster. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/antonyms/booster
Built for writers, students, and competitive word game players, Wordmom combines an uncluttered English dictionary and thesaurus with fast, pattern-based word finders so you can verify definitions, synonyms, and high-scoring tile plays in one place.
Word Games & Solvers
Word FinderScrabble Word FinderWords With Friends CheatWordle SolverAnagram Solver
Dictionary & Reference
DictionarySynonymsAntonymsWords
Community
Contact UsEditorial PolicyPrivacy PolicyTerms and Conditions
© 2016–2026 Wordmom Network. All rights reserved. Made with for word lovers everywhere.
Disclaimer: SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A. and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. Words With Friends® is a registered trademark of Zynga Inc. Wordle® is a registered trademark of The New York Times Company. Other referenced game titles and tournament lexicon codes (including NASPA NWL and WESPA/HarperCollins CSW) are trademarks of their respective owners. Wordmom is an independent reference utility for educational and entertainment purposes and is not affiliated with, sponsored by, or endorsed by Hasbro, Mattel, Spear, Zynga, The New York Times Company, NASPA, WESPA, or HarperCollins Publishers. All game names are referenced strictly under nominative fair use to indicate compatibility.