intrusion

/ɪnˈtɹuːʒən/

//ɪnˈtɹuːʒən// noun

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

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

The verdict

“intrusion” has 14 generated spelling variants in the English index at frequency #16,733. The variants make it a useful spelling check.

#16,733
frequency rank, English
2,140
“I” headwords
14
tracked misspellings
3
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The forcible inclusion or entry of an external group or individual; the act of intruding.

Corpus desk

Index EN-intrusion · intrusion · English

intrusion · rank #16,733 · 14 variants · 3 confusables

  • FREQ-MID #16,733
  • LEN-LONG 9 letters
  • VOW-4 4 vowels
  • CONFUS-LOW 3 pairs
  • VAR-HIGH 14 variants
  • BOOK-MID 2,140
  • PHOTO-FINISH inverse

Nearest frequency peer: inverse (+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 “intrusion”

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

corpus weight

What this shows “intrusion” 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).

intrusion vs intrusive
78% similar
intrusion vs infusion
78% similar
intrusion vs inclusion
78% similar

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

Key facts for intrusion
PropertyValue
Headwordintrusion
LanguageEnglish
Part of speechNoun
IPA/ɪnˈtɹuːʒən/
Letters9
Frequency rank#16,733
Misspellings tracked14
Confusable pairs3
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “intrusion”

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

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

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “inverse” (#16,734), “incarnation” (#16,731), “inverted” (#16,735). Among 2,140 “I” headwords, “intrusion” is #16,733. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 14 spelling variants around intrusion (IPA /ɪnˈtɹuːʒən/), anoun. Corpus frequency is #16,733 among 2,140 “I” headwords. Wiktionary lists 5 senses, so context still picks the gloss.

Our generated misspelling index lists 14 likely wrong-spelling variants for intrusion, with forms such as "inntrusion", "inrtusion", and "intrrusion". Every one of these variants traces to a single-character edit -- an added or dropped letter, a swapped consonant, or a vowel swap -- the kind of slip a spell-checker is built to catch. It also participates in 3 confusable-pair relationships, "intrusive", "infusion", "inclusion", where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: From Middle English intrusioun, from Old French intrusion, from Medieval Latin intrūsiō, from intrūdō, from Latin in- + trūdō. The correct English form is intrusion, spelled I-N-T-R-U-S-I-O-N.

Definition

  1. 1
    The forcible inclusion or entry of an external group or individual; the act of intruding.
  2. 2
    Magma forced into other rock formations; the rock formed when such magma solidifies.
  3. 3
    A structure that lies within a historic district but is nonhistoric and irrelevant to the district.
  4. 4
    The insertion of a phoneme into the pronunciation of a word despite its absence from the spelling. (e.g. intrusive r)
  5. 5
    An involuntarily arising idea or memory that is nuisant and falsifies an accurate impression of the world.

Recorded use

Wiktionary examples

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

  1. She viewed sales calls as an unwelcome intrusion.
  2. Sudden anger rose in him. “What I’m looking for,” he barked, “is to be left in peace.” His voice trembled with a rage far bigger than her intrusion merited, the rage which shocked him whenever it coursed through his nervous system, like a flood.

Etymology

From Middle English intrusioun, from Old French intrusion, from Medieval Latin intrūsiō, from intrūdō, from Latin in- + trūdō.

This word in other languages

intrusión(Español)intrusion(Français)Intrusion(Deutsch)intrusão(Português)

Common misspellings

Also misspelled as:

  • inntrusion
  • inrtusion
  • intrrusion
  • intrsuion
  • intruison
  • intrusino
  • intrusionn
  • intrusoin
  • intrussion
  • intrution
  • inttrusion
  • intursion
  • itnrusion
  • nitrusion

Misspelling Pattern Breakdown

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

inntrusion1inrtusion2intrrusion1intrsuion2intruison2intrusino2intrusionn1intrusoin2
Edit distance from "intrusion"

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 "intrusion"?
"intrusion" is spelled I-N-T-R-U-S-I-O-N. The IPA pronunciation is /ɪnˈtɹuːʒən/.
What does "intrusion" mean?
As a noun, "intrusion" means: The forcible inclusion or entry of an external group or individual; the act of intruding.
What words are commonly confused with "intrusion"?
"intrusion" is commonly confused with "intrusive", "infusion", "inclusion". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "intrusion"?
The IPA (International Phonetic Alphabet) transcription for "intrusion" is /ɪnˈtɹuːʒən/. 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 "intrusion"?
From Middle English intrusioun, from Old French intrusion, from Medieval Latin intrūsiō, from intrūdō, from Latin in- + trūdō. 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 "intrusion", not the corpus desk frequency band.

Same letter count

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

Mansfield#16,745Greenland#16,720misguided#16,752farmhouse#16,707

Similar misspelling depth

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

livelihood14 variantsphosphate14 variantsplurality14 variantsdisparity14 variants

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

Source: FrequencyWords open word-frequency list