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” has 10 generated spelling variants in the English index at frequency #13,672. The variants make it a useful spelling check.

#13,672
frequency rank, English
4,121
“B” headwords
10
tracked misspellings
13
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Something that boosts.

Corpus desk

Index EN-booster · booster · English

booster · rank #13,672 · 10 variants · 13 confusables

  • FREQ-MID #13,672
  • LEN-LONG 7 letters
  • VOW-3 3 vowels
  • CONFUS-MID 13 pairs
  • VAR-MID 10 variants
  • BOOK-MID 4,121
  • PHOTO-FINISH blush

Nearest frequency peer: blush (-1 rank slots)

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Rank peers near misspelling magnet “booster”

Same rarity band: useful when a typo lands on a peer headword

corpus weight

What this shows “booster” sits among these FrequencyWords peers; misspelling depth is tracked separately in the edit-distance chart.

Source FrequencyWords open word-frequency list As of September 3, 2026

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)

Frequency seat of misspelling magnet “booster”

This scale runs from the tiny cluster of words that carry ordinary speech (left) to the long tail of words almost nobody reaches for (right).boosterlands here:

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

Ticks step logarithmically, so each one marks a roughly tenfold drop in how often the word turns up. Same rarity band neighbours include “blush” (#13,671), “braves” (#13,673), “Bloomberg” (#13,670). Among 4,121 “B” headwords, “booster” is #13,672. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 10 spelling variants around booster (IPA /ˈbustɚ/), anoun. Corpus frequency is #13,672 among 4,121 “B” headwords. Wiktionary lists 13 senses, so context still picks the gloss.

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.

Recorded use

Wiktionary examples

These source excerpts show how booster appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. DUBNER: Now, the Children's Hospital of Philadelphia, some officials there, after we published these findings in the New York Times, wrote a letter to the editor, and it said, "Our research consistently shows that child safety seats and booster seats significantly lower the risk of serious injury compared to seatbelts alone." They go on to say that your r…
  2. The Pied Piper treats Lowenstein as a metaphor for American post-war liberalism and subjects a once highly regarded political movement to the same scrutiny Lowenstein himself faces. Not too surprisingly, both come out wanting, though their boosters claim otherwise.

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.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "booster", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 7 letters (nearest by frequency rank).

bedtime#13,668Armenia#13,661clicked#13,686commute#13,687

Similar misspelling depth

Headwords with a similar count of attested misspellings (10 here; floor ≥5).

calmly10 variantsaquarium10 variantsabdomen10 variantscraving10 variants

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

Source: FrequencyWords open word-frequency list