immunisation
"immunisation" is a 12-letter English headword indexed on PlainSpell.
The verdict
“immunisation” is uncommon English (frequency #55,508 among 2,140 “I” headwords), classed as a noun. The kind of spelling people second-guess.
- #55,508
- frequency rank, English
- 2,140
- “I” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Alternative spelling of immunization.
Corpus desk
Index EN-immunisation · immunisation · English
immunisation · rank #55,508 · 0 variants · 0 confusables
- FREQ-RARE #55,508
- LEN-MEGA 12 letters
- VOW-6 6 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 2,140
- PHOTO-FINISH immolation
Nearest frequency peer: immolation (-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.
Long-tail ranks near “immunisation”
Sparse band: bars invert rank so rarer forms read shorter
- immaculately
immaculately
44,495 corpus weight
- immolation
immolation
44,494 corpus weight
- immunisation
immunisation
44,493 corpus weight
- impudent
impudent
44,492 corpus weight
- incentivize
incentivize
44,491 corpus weight
- incontrover…
incontrovertible
44,490 corpus weight
What this shows Long-tail view: where “immunisation” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | immunisation |
| Language | English |
| Part of speech | Noun |
| Letters | 12 |
| Frequency rank | #55,508 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “immunisation” in English
Rare enough to double-check
immunisation is uncommon English at frequency #55,508 among 2,140 “I” headwords, classed as anoun. Rarity is why readers land here mid-draft. 2 senses are on record.
immunisation doesn't appear in our generated misspelling index, since its letter pattern doesn't lend itself to common typo substitutions. No close-neighbour confusable shows up for this headword in our dataset, since no other headword is close enough in sound or shape to pair with it.
Etymologically, the entry records: From French immunisation. Equivalent to immunise + -ation or immune + -isation. The correct English form is immunisation, spelled I-M-M-U-N-I-S-A-T-I-O-N.
Definition
- 1Alternative spelling of immunization.
- 2The process of immunising signalling and traction power supplies so they don't interfere with each other.
Recorded use
Wiktionary examplesThese source excerpts show how immunisation appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
The larger the number of immunised people in the community the less easy is the spread of disease from one person to another. […] For the purpose of creating ‘herd immunity’, as this process is sometimes called, it is necessary to achieve 80 per cent immunisation of the community.
All babies born in the UK will receive the hepatitis B jab as part of their routine immunisations from the autumn in an effort to drive down viral infections that cause cirrhosis and liver cancer.
Etymology
From French immunisation. Equivalent to immunise + -ation or immune + -isation.
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
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "immunisation", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 12 letters (nearest by frequency rank).