booster
12 synonyms for booster, grouped by meaning and by how common each one is.
Noun — An additional dose of a vaccine given to renew or strengthen immunity.
Synonyms
Everyday swaps
Common words most readers know — safe in any writing.
Less common
Still standard English, but they carry more weight.
Rare, literary or technical
Precise, but they will stand out — check the sense before using one.
How to use booster
The word patterns that sound natural to a native speaker.
booster shot
signal booster
rocket booster
Etymology
Formed from the verb "boost" plus the agent suffix "-er."
Full origin of booster →Frequently asked questions
What does “booster” mean?
The word “booster” means an additional dose of a vaccine given to renew or strengthen immunity. In plain terms, something (or someone) that adds extra strength, power, or support.
How do you pronounce “booster”?
“Booster” is pronounced BOOST (/ˈbustɚ/ in IPA).
How do you use “booster” in a sentence?
Here is “booster” used in a sentence: “He got his flu booster in early autumn.”
What part of speech is “booster”?
“Booster” is a noun.
Is “booster” a common word?
“Booster” is an uncommon word in modern English.
How many meanings does “booster” have?
“Booster” has 3 distinct senses listed in this dictionary. The most common is: an additional dose of a vaccine given to renew or strengthen immunity.
What is the difference between a booster shot and a regular vaccine dose?
A regular vaccine dose is part of the initial immunization series meant to establish immunity, while a booster shot is an additional dose given later to renew or strengthen immunity that may have weakened over time. Boosters are typically administered after the initial series has already provided a baseline level of protection.
What is the difference between a booster and an amplifier when talking about signals?
A booster increases the power, signal, or force of something, such as a Wi-Fi signal or rocket stage, generally to extend range or strength. An amplifier specifically increases the amplitude of an electronic signal, most often used in audio contexts, making it a more specialized type of booster.
Can booster refer to a person rather than a device or vaccine dose?
Yes, booster can also describe a person who actively supports or promotes something, such as a local booster who champions their community or a sports team. This sense is distinct from the medical or mechanical meanings but shares the underlying idea of increasing strength or support.
