concussion

/kənˈkʌʃən/

//kənˈkʌʃən// noun

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

"concussion" is a 10-letter English headword indexed on PlainSpell.

The verdict

“concussion” has 14 generated spelling variants in the English index at frequency #13,689. The variants make it a useful spelling check.

#13,689
frequency rank, English
5,599
“C” headwords
14
tracked misspellings
4
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A violent collision or shock.

Corpus desk

Index EN-concussion · concussion · English

concussion · rank #13,689 · 14 variants · 4 confusables

  • FREQ-MID #13,689
  • LEN-MEGA 10 letters
  • VOW-4 4 vowels
  • CONFUS-MID 4 pairs
  • VAR-HIGH 14 variants
  • BOOK-DENSE 5,599
  • PHOTO-FINISH complementary

Nearest frequency peer: complementary (-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 “concussion”

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

corpus weight

What this shows “concussion” 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).

concussion vs confusion
80% similar
concussion vs confession
80% similar
concussion vs conclusion
80% similar

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

Key facts for concussion
PropertyValue
Headwordconcussion
LanguageEnglish
Part of speechNoun
IPA/kənˈkʌʃən/
Letters10
Frequency rank#13,689
Misspellings tracked14
Confusable pairs4
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “concussion”

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

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

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “complementary” (#13,688), “connectivity” (#13,690), “commute” (#13,687). Among 5,599 “C” headwords, “concussion” is #13,689. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 14 spelling variants around concussion (IPA /kənˈkʌʃən/), anoun. Corpus frequency is #13,689 among 5,599 “C” headwords. Wiktionary lists 3 senses, so context still picks the gloss.

Our generated misspelling index lists 14 likely wrong-spelling variants for concussion, with forms such as "cconcussion", "cnocussion", and "cocnussion". Each of these forms differs from the correct spelling by one small edit: a doubled letter, a dropped silent letter, or a substituted vowel. It also participates in 4 confusable-pair relationships, "confusion", "confession", "conclusion", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.

Etymologically, the entry records: From Latin concussiō. Equivalent to concuss + -ion. The correct English form is concussion, spelled C-O-N-C-U-S-S-I-O-N.

Definition

  1. 1
    A violent collision or shock.
  2. 2
    An injury to part of the body, most especially the brain, caused by a violent blow, followed by loss of function.
  3. 3
    The unlawful forcing of another by threats of violence to yield up something of value.

Recorded use

Wiktionary examples

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

  1. It is believed that great ringing of bells, in populous cities, hath dissipated pestilent air; which may be from the concussion of the air.
  2. [Water vapour bubbles] hit againſt the ſides of the more eminent and Mountainous Places, of the Globe, and by this Concuſſion are condenſed, and thus become heavier than the Air they ſvvom in, and ſo gleet dovvn the rocky Caverns of theſe Mountains, […]

Etymology

From Latin concussiō. Equivalent to concuss + -ion.

This word in other languages

choque(Español)choc(Français)Gehirnerschütterung(Deutsch)

Common misspellings

Also misspelled as:

  • cconcussion
  • cnocussion
  • cocnussion
  • conccussion
  • concsusion
  • concusion
  • concusison
  • concussino
  • concussionn
  • concussoin
  • concustion
  • conncussion
  • conucssion
  • ocncussion

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of concussion - counted as single-character edits (an insertion, a deletion, or a substituted letter). The larger the bar, the easier the typo is to spot; one-edit slips are the ones that sneak past readers.

cconcussion1cnocussion2cocnussion2conccussion1concsusion2concusion1concusison2concussino2
Edit distance from "concussion"

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 "concussion"?
"concussion" is spelled C-O-N-C-U-S-S-I-O-N. The IPA pronunciation is /kənˈkʌʃən/.
What does "concussion" mean?
As a noun, "concussion" means: A violent collision or shock.
What words are commonly confused with "concussion"?
"concussion" is commonly confused with "confusion", "confession", "conclusion". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "concussion"?
The IPA (International Phonetic Alphabet) transcription for "concussion" is /kənˈkʌʃən/. 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 "concussion"?
From Latin concussiō. Equivalent to concuss + -ion. 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 "concussion", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 10 letters (nearest by frequency rank).

calculator#13,676belongings#13,669encryption#13,709antibodies#13,659

Similar misspelling depth

Headwords with a similar count of attested misspellings (14 here; floor ≥5).

cleansing14 variantsdeparting14 variantscaptivity14 variantsBloomberg14 variants

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

Source: FrequencyWords open word-frequency list