occlusion

/əˈkluː.ʒən/

//əˈkluː.ʒən// noun

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

"occlusion" is a 9-letter English headword indexed on PlainSpell.

The verdict

“occlusion” has 12 generated spelling variants in the English index at frequency #39,464. The variants make it a useful spelling check.

#39,464
frequency rank, English
1,431
“O” headwords
12
tracked misspellings
1
confusable pair

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The process of occluding, or something that occludes.

Corpus desk

Index EN-occlusion · occlusion · English

occlusion · rank #39,464 · 12 variants · 1 confusable

  • FREQ-MID #39,464
  • LEN-LONG 9 letters
  • VOW-4 4 vowels
  • CONFUS-LOW 1 pairs
  • VAR-MID 12 variants
  • BOOK-MID 1,431
  • PHOTO-FINISH Oliveira

Nearest frequency peer: Oliveira (+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 “occlusion”

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

corpus weight

What this shows “occlusion” 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).

occlusion vs occasion
78% similar

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

Key facts for occlusion
PropertyValue
Headwordocclusion
LanguageEnglish
Part of speechNoun
IPA/əˈkluː.ʒən/
Letters9
Frequency rank#39,464
Misspellings tracked12
Confusable pairs1
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “occlusion”

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).occlusionlands here:

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

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “Oliveira” (#39,465), “opa” (#39,466), “NWA” (#39,461). Among 1,431 “O” headwords, “occlusion” is #39,464. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 12 spelling variants around occlusion (IPA /əˈkluː.ʒən/), anoun. Corpus frequency is #39,464 among 1,431 “O” headwords. Wiktionary lists 7 senses, so context still picks the gloss.

Our generated misspelling index lists 12 likely wrong-spelling variants for occlusion, with forms such as "coclusion", "occllusion", and "occlsuion". 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 1 confusable-pair relationship, "occasion", since the words sound or look close enough that writers reach for the wrong one mid-sentence.

Etymologically, the entry records: Borrowed from Late Latin occlūsiō, occlūsiōnis (“occluding, obstruction”), from the Classical Latin occlūdō (“I shut up or close up; I restrain”), from ob + claudō (“I shut or close”). The correct English form is occlusion, spelled O-C-C-L-U-S-I-O-N.

Definition

  1. 1
    The process of occluding, or something that occludes.
  2. 2
    Anything that obstructs or closes a vessel or canal.
  3. 3
    The alignment of the teeth when upper and lower jaws are brought together.
  4. 4
    An occluded front.
  5. 5
    A closure within the vocal tract that produces an oral stop or nasal stop.
  6. 6
    The absorption of a gas or liquid by a substance such as a metal.
  7. 7
    The blocking of the view of part of an image by another.

Etymology

Borrowed from Late Latin occlūsiō, occlūsiōnis (“occluding, obstruction”), from the Classical Latin occlūdō (“I shut up or close up; I restrain”), from ob + claudō (“I shut or close”).

This word in other languages

oclusión(Español)

Common misspellings

Also misspelled as:

  • coclusion
  • occllusion
  • occlsuion
  • occluison
  • occlusino
  • occlusionn
  • occlusoin
  • occlussion
  • occlution
  • occulsion
  • oclcusion
  • oclusion

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of occlusion - 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.

coclusion2occllusion1occlsuion2occluison2occlusino2occlusionn1occlusoin2occlussion1
Edit distance from "occlusion"

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 "occlusion"?
"occlusion" is spelled O-C-C-L-U-S-I-O-N. The IPA pronunciation is /əˈkluː.ʒən/.
What does "occlusion" mean?
As a noun, "occlusion" means: The process of occluding, or something that occludes.
What words are commonly confused with "occlusion"?
"occlusion" is commonly confused with "occasion". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "occlusion"?
The IPA (International Phonetic Alphabet) transcription for "occlusion" is /əˈkluː.ʒən/. 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 "occlusion"?
Borrowed from Late Latin occlūsiō, occlūsiōnis (“occluding, obstruction”), from the Classical Latin occlūdō (“I shut up or close up; I restrain”), from ob + claudō (“I shut or close”). 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 "occlusion", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 9 letters (nearest by frequency rank).

paralegal#39,471Mormonism#39,438prismatic#39,492raindrops#39,513

Similar misspelling depth

Headwords with a similar count of attested misspellings (12 here; floor ≥5).

pocketed12 variantsmoveable12 variantsmonotony12 variantsmonogamy12 variants

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

Source: FrequencyWords open word-frequency list