ionisation
"ionisation" is a 10-letter English headword indexed on PlainSpell.
The verdict
“ionisation” is uncommon English (frequency #95,001 among 17,902 “I” headwords), classed as a noun. The kind of spelling people second-guess.
- #95,001
- frequency rank, English
- 17,902
- “I” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Alternative spelling of ionization.
Corpus desk
Index EN-ionisation · ionisation · English
ionisation · rank #95,001 · 0 variants · 0 confusables
- FREQ-RARE #95,001
- LEN-MEGA 10 letters
- VOW-6 6 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-DENSE 17,902
- PHOTO-FINISH irretrievable
Nearest frequency peer: irretrievable (+3 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.
Frequency neighbourhood for “ionisation”
Lower corpus rank = more everyday usage (inverted bar length for readability)
- instal
instal
5,008 corpus weight
- instantiati…
instantiation
5,007 corpus weight
- interpolate
interpolate
5,004 corpus weight
- ionisation
ionisation
5,000 corpus weight
- irretrievab…
irretrievable
4,997 corpus weight
- Islamisation
Islamisation
4,993 corpus weight
What this shows Bars show where “ionisation” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.
| Property | Value |
|---|---|
| Headword | ionisation |
| Language | English |
| Part of speech | Noun |
| Letters | 10 |
| Frequency rank | #95,001 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “ionisation” sits in English frequency
Rare enough to double-check
ionisation is uncommon English at frequency #95,001 among 17,902 “I” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "Alternative spelling of ionization.".
No misspelling variants are generated for ionisation in our index, since its letter sequence doesn't invite the usual edit-distance slips. Our confusable-pair dataset has no match for it, since no other headword is close enough in sound or shape to pair with it.
Etymologically, the entry records: From ionise + -ation. The correct English form is ionisation, spelled I-O-N-I-S-A-T-I-O-N.
Definition
- 1Alternative spelling of ionization.
Etymology
From ionise + -ation.
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.
PlainSpell is rendered directly from structured Wiktionary extracts and open word-frequency lists, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 6, 2026. Primary sources: Wiktionary (via kaikki.org) and FrequencyWords.
Frequently Asked Questions
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "ionisation", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 10 letters (nearest by frequency rank).
Data Source
Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.