booster

/ˈbustɚ/

//ˈbustɚ// noun

By · According to Wiktionary data (CC BY-SA) ·

"booster" is a 7-letter English headword indexed on PlainSpell.

The verdict

“booster” is a moderately-common English word, ranked #13,672 in English word frequency and used as a noun.

#13,672
frequency rank, English
7
letters
10
tracked misspellings
13
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Something that boosts.

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

booster vs buster
71% similar
booster vs booted
71% similar
booster vs bowser
71% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for booster
PropertyValue
Headwordbooster
LanguageEnglish
Part of speechNoun
IPA/ˈbustɚ/
Letters7
Frequency rank#13,672
Misspellings tracked10
Confusable pairs13
SourceWiktionary (kaikki.org)

Where “booster” sits in English frequency

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right). booster lands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Spelling & Dictionary Insight

The English entry for booster is 7 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /ˈbustɚ/. Corpus data places it at rank #13,672 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 13 distinct senses for this headword, so context determines which meaning a reader should apply.

Our generated misspelling index lists 10 likely wrong-spelling variants for booster, with forms such as "bbooster", "boosetr", and "boosster". Each variant is a distinct typo pattern an edit-distance generator flags, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution. It also participates in 13 confusable-pair relationships, "buster", "booted", "bowser", and more, since the words sound or look close enough that writers reach for the wrong one mid-sentence.

Etymologically, the entry records: From boost + -er. The correct English form is booster, spelled B-O-O-S-T-E-R.

Definition

  1. 1
    Something that boosts.
  2. 2
    Ellipsis of booster seat.
  3. 3
    The first stage of a multistage rocket, providing primary or supplemental thrust for liftoff and early flight.
  4. 4
    A motor-generator set used for voltage regulation in direct current electrical power circuits.
  5. 5
    Someone who publicly promotes or endorses (something or someone); a fan or supporter.
  6. 6
    A member of a booster club.
  7. 7
    A booster dose.
  8. 8
    A small quantity of a sensitive explosive that is triggered by a detonator and provides the energy needed to detonate a larger quantity of a less-sensitive explosive.
  9. 9
    A term that serves to amplify or strengthen an utterance, such as "really".
  10. 10
    A power-up item.
  11. 11
    A package of cards or figurines designed to add to a player's collection.
  12. 12
    A thief.
  13. 13
    A booster engine fitted to a steam locomotive.

Etymology

From boost + -er.

This word in other languages

refuerzo(Español)lanceur(Français)Unterstützung(Deutsch)

Common misspellings

Also misspelled as: bbooster,boosetr,boosster,boosterr,boostre,boostter,bootser,bosoter,boster,oboster

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of booster - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.

bbooster1boosetr2boosster1boosterr1boostre2boostter1bootser2bosoter2
Edit distance from "booster"

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "booster"?
"booster" is spelled B-O-O-S-T-E-R. The IPA pronunciation is /ˈbustɚ/.
What does "booster" mean?
As a noun, "booster" means: Something that boosts.
What words are commonly confused with "booster"?
"booster" is commonly confused with "buster", "booted", "bowser". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "booster"?
The IPA (International Phonetic Alphabet) transcription for "booster" is /ˈbustɚ/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "booster"?
From boost + -er. See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Using “booster”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is B-O-O-S-T-E-R - every other letter order is a misspelling in standard orthography.
  • Say it as /ˈbustɚ/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • Don't mix it up with “buster” - see the side-by-side comparison. booster vs buster
  • Browse more English words and confusable pairs in the same reference. English words
Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list