inclusion

/ɪnˈkluːʒən/

//ɪnˈkluːʒən// noun

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

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

The verdict

“inclusion” has 14 generated spelling variants in the English index at frequency #6,921. The variants make it a useful spelling check.

#6,921
frequency rank, English
2,140
“I” headwords
14
tracked misspellings
6
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - An addition or annex to a group, set, or total.

Corpus desk

Index EN-inclusion · inclusion · English

inclusion · rank #6,921 · 14 variants · 6 confusables

  • FREQ-COMMON #6,921
  • LEN-LONG 9 letters
  • VOW-4 4 vowels
  • CONFUS-MID 6 pairs
  • VAR-HIGH 14 variants
  • BOOK-MID 2,140
  • PHOTO-FINISH idiots

Nearest frequency peer: idiots (-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 “inclusion”

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

corpus weight

What this shows “inclusion” 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).

inclusion vs infusion
78% similar
inclusion vs inclusive
78% similar
inclusion vs intrusion
78% similar

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

Key facts for inclusion
PropertyValue
Headwordinclusion
LanguageEnglish
Part of speechNoun
IPA/ɪnˈkluːʒən/
Letters9
Frequency rank#6,921
Misspellings tracked14
Confusable pairs6
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “inclusion”

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).inclusionlands 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 “idiots” (#6,920), “ideology” (#6,919), “innings” (#6,923). Among 2,140 “I” headwords, “inclusion” is #6,921. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 14 spelling variants around inclusion (IPA /ɪnˈkluːʒən/), anoun. Corpus frequency is #6,921 among 2,140 “I” headwords. Wiktionary lists 8 senses, so context still picks the gloss.

Our generated misspelling index lists 14 likely wrong-spelling variants for inclusion, with forms such as "icnlusion", "incclusion", and "incllusion". 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 6 confusable-pair relationships, "infusion", "inclusive", "intrusion", and more, since the words sound or look close enough that writers reach for the wrong one mid-sentence.

Etymologically, the entry records: Borrowed from Latin inclusio, inclusionis, from the verb Latin inclūdō (“to shut in, enclose, insert”), from in- (“in”) + claudō (“to shut”), ultimately from Proto-Indo-European *kleh₂u- (“key, hook, nail”). By surface analysis, include + -sion. Doublet of … The correct English form is inclusion, spelled I-N-C-L-U-S-I-O-N.

Definition

  1. 1
    An addition or annex to a group, set, or total.
  2. 2
    The act of including, i.e. adding or annexing, (something) to a group, set, or total.
  3. 3
    Anything foreign that is included in a material.
  4. 4
    Any material that is trapped inside a mineral during its formation, as a defect in a precious stone.
  5. 5
    A nuclear or cytoplasmic aggregate of stainable substances.
  6. 6
    An object completely inside a tissue, such as epidermal inclusion cyst, a cyst in the epidermis.
  7. 7
    A mapping where the domain is a subset of the image.
  8. 8
    Restriction; limitation.

Recorded use

Wiktionary examples

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

  1. The poem was a new inclusion in the textbook.
  2. The inclusion of the poem added value to the course.

Etymology

Borrowed from Latin inclusio, inclusionis, from the verb Latin inclūdō (“to shut in, enclose, insert”), from in- (“in”) + claudō (“to shut”), ultimately from Proto-Indo-European *kleh₂u- (“key, hook, nail”). By surface analysis, include + -sion. Doublet of enclosure.

Antonyms

exclusion

This word in other languages

inclusión(Español)inclusion(Français)inclusão(Português)

Common misspellings

Also misspelled as:

  • icnlusion
  • incclusion
  • incllusion
  • inclsuion
  • incluison
  • inclusino
  • inclusionn
  • inclusoin
  • inclussion
  • inclution
  • inculsion
  • inlcusion
  • innclusion
  • niclusion

Misspelling Pattern Breakdown

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

icnlusion2incclusion1incllusion1inclsuion2incluison2inclusino2inclusionn1inclusoin2
Edit distance from "inclusion"

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 "inclusion"?
"inclusion" is spelled I-N-C-L-U-S-I-O-N. The IPA pronunciation is /ɪnˈkluːʒən/.
What does "inclusion" mean?
As a noun, "inclusion" means: An addition or annex to a group, set, or total.
What words are commonly confused with "inclusion"?
"inclusion" is commonly confused with "infusion", "inclusive", "intrusion". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "inclusion"?
The IPA (International Phonetic Alphabet) transcription for "inclusion" is /ɪnˈkluːʒən/. 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 "inclusion"?
Borrowed from Latin inclusio, inclusionis, from the verb Latin inclūdō (“to shut in, enclose, insert”), from in- (“in”) + claudō (“to shut”), ultimately from Proto-Indo-European *kleh₂u- (“key, hook, nail”). By surface analysis, include + -sion. D... 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 "inclusion", not the corpus desk frequency band.

Same letter count

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

isolation#6,926justified#6,928machinery#6,932dimension#6,893

Similar misspelling depth

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

questioned14 variantsconfusing14 variantssubscribe14 variantsterritories14 variants

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

Source: FrequencyWords open word-frequency list