illusion

/ɪˈl(j)uːʒ(ə)n/

//ɪˈl(j)uːʒ(ə)n// noun

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

"illusion" is a 8-letter English headword indexed on PlainSpell.

The verdict

“illusion” has 10 generated spelling variants in the English index at frequency #7,803. The variants make it a useful spelling check.

#7,803
frequency rank, English
2,140
“I” headwords
10
tracked misspellings
2
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Anything that seems to be something that it is not.

Corpus desk

Index EN-illusion · illusion · English

illusion · rank #7,803 · 10 variants · 2 confusables

  • FREQ-COMMON #7,803
  • LEN-LONG 8 letters
  • VOW-4 4 vowels
  • CONFUS-LOW 2 pairs
  • VAR-MID 10 variants
  • BOOK-MID 2,140
  • PHOTO-FINISH idol

Nearest frequency peer: idol (-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 “illusion”

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

corpus weight

What this shows “illusion” 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).

illusion vs infusion
75% similar
illusion vs inclusion
78% similar

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

Key facts for illusion
PropertyValue
Headwordillusion
LanguageEnglish
Part of speechNoun
IPA/ɪˈl(j)uːʒ(ə)n/
Letters8
Frequency rank#7,803
Misspellings tracked10
Confusable pairs2
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “illusion”

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).illusionlands here:

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

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “idol” (#7,802), “incorrect” (#7,804), “hunters” (#7,801). Among 2,140 “I” headwords, “illusion” is #7,803. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 10 spelling variants around illusion (IPA /ɪˈl(j)uːʒ(ə)n/), anoun. Corpus frequency is #7,803 among 2,140 “I” headwords. Wiktionary lists 4 senses, so context still picks the gloss.

Our generated misspelling index lists 10 likely wrong-spelling variants for illusion, with forms such as "illsuion", "illuison", and "illusino". 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 2 confusable-pair relationships, "infusion", "inclusion", where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: From Old French illusion, from Latin illūsiō, from illūdere, from in- (“at, upon”) + lūdere (“to play, mock, trick”). Displaced native Old English dwimmer. The correct English form is illusion, spelled I-L-L-U-S-I-O-N.

Definition

  1. 1
    Anything that seems to be something that it is not.
  2. 2
    A misapprehension; a belief in something that is in fact not true.
  3. 3
    A magician’s trick.
  4. 4
    The state of being deceived or misled.

Recorded use

Wiktionary examples

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

  1. We saw what looked like a tiger among the trees, but it was an illusion caused by the shadows of the branches.
  2. Using artificial additives, scientists can create the illusion of fruit flavours in food.

Etymology

From Old French illusion, from Latin illūsiō, from illūdere, from in- (“at, upon”) + lūdere (“to play, mock, trick”). Displaced native Old English dwimmer.

Synonyms

miragephantomdelusionmisapprehensionmisbeliefmisconception

This word in other languages

ilusión(Español)illusion(Français)Illusion(Deutsch)ilusão(Português)

Common misspellings

Also misspelled as:

  • illsuion
  • illuison
  • illusino
  • illusionn
  • illusoin
  • illussion
  • illution
  • ilulsion
  • ilusion
  • lilusion

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of illusion - expressed in single-character edits (insert, delete, or swap one letter). Bigger bars stand out at a glance; a one-edit slip is the hardest to catch.

illsuion2illuison2illusino2illusionn1illusoin2illussion1illution1ilulsion2
Edit distance from "illusion"

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 "illusion"?
"illusion" is spelled I-L-L-U-S-I-O-N. The IPA pronunciation is /ɪˈl(j)uːʒ(ə)n/.
What does "illusion" mean?
As a noun, "illusion" means: Anything that seems to be something that it is not.
What words are commonly confused with "illusion"?
"illusion" is commonly confused with "infusion", "inclusion". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "illusion"?
The IPA (International Phonetic Alphabet) transcription for "illusion" is /ɪˈl(j)uːʒ(ə)n/. 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 "illusion"?
From Old French illusion, from Latin illūsiō, from illūdere, from in- (“at, upon”) + lūdere (“to play, mock, trick”). Displaced native Old English dwimmer. 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 "illusion", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 8 letters (nearest by frequency rank).

junction#7,806guessing#7,798grinding#7,796medicare#7,815

Similar misspelling depth

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

manages10 variantsoptimal10 variantsconsist10 variantsbreasts10 variants

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

Source: FrequencyWords open word-frequency list