malformation

noun

"malformation" is a 12-letter English headword indexed on PlainSpell.

The verdict

“malformation” is uncommon English (frequency #57,546 among 4,057 “M” headwords), classed as a noun. The kind of spelling people second-guess.

#57,546
frequency rank, English
4,057
“M” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - An abnormal formation.

Corpus desk

Index EN-malformation · malformation · English

malformation · rank #57,546 · 0 variants · 0 confusables

  • FREQ-RARE #57,546
  • LEN-MEGA 12 letters
  • VOW-5 5 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 4,057
  • PHOTO-FINISH Mainwaring

Nearest frequency peer: Mainwaring (-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 “malformation”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

What this shows Long-tail view: where “malformation” sits against similarly uncommon English ranks.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for malformation
PropertyValue
Headwordmalformation
LanguageEnglish
Part of speechNoun
Letters12
Frequency rank#57,546
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “malformation” in English

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

#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. Rare peers in the same band: “Mainwaring” (#57,545), “manes” (#57,547), “maquis” (#57,548). Among 4,057 “M” headwords, “malformation” is #57,546. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

malformation is uncommon English at frequency #57,546 among 4,057 “M” headwords, classed as anoun. Rarity is why readers land here mid-draft. 2 senses are on record.

Zero misspellings are on record for malformation in our index, which points to an orthography that plays by predictable English rules. This entry stands alone in our confusable dataset, a sign it's visually distinctive enough not to be mixed up with another word.

Etymologically, the entry records: From mal- + formation. The correct English form is malformation, spelled M-A-L-F-O-R-M-A-T-I-O-N.

Definition

  1. 1
    An abnormal formation.
  2. 2
    An abnormal developmental feature of offspring.

Recorded use

Wiktionary example

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

  1. Mr. Hyde was pale and dwarfish, he gave an impression of deformity without any nameable malformation, he had a displeasing smile, he had borne himself to the lawyer with a sort of murderous mixture of timidity and boldness, and he spoke with a husky, whispering and somewhat broken voice; […]

Etymology

From mal- + formation.

This word in other languages

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 "malformation"?
"malformation" is spelled M-A-L-F-O-R-M-A-T-I-O-N.
What does "malformation" mean?
As a noun, "malformation" means: An abnormal formation.
What is the origin of the word "malformation"?
From mal- + formation. 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 "malformation", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 12 letters (nearest by frequency rank).

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

Source: FrequencyWords open word-frequency list