rouille

\ʁuj\

/\ʁuj\/ noun

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

The verdict

“rouille” has 7 generated spelling variants in the French index at frequency #19,664. The variants make it a useful spelling check.

#19,664
frequency rank, French
5,742
“R” headwords
7
tracked misspellings
4
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Matière friable, composée d’hydroxyde de fer, qui se forme sur les métaux ferreux par oxydation au contact de l’eau et de l’air.

Corpus desk

Index FR-rouille · rouille · French

rouille · rank #19,664 · 7 variants · 4 confusables

  • FREQ-MID #19,664
  • LEN-LONG 7 letters
  • VOW-4 4 vowels
  • CONFUS-MID 4 pairs
  • VAR-MID 7 variants
  • BOOK-DENSE 5,742
  • PHOTO-FINISH Roissy

Nearest frequency peer: Roissy (-1 rank slots)

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.

Pairs de rang près de l'aimant d'erreurs « rouille »

Même bande de rareté: utile si une faute tombe sur un lemme voisin

corpus weight

What this shows « rouille » siège parmi ces pairs FrequencyWords; la profondeur des fautes est suivie à part dans le graphique d'édition.

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).

rouille vs roulé
57% similar
rouille vs ruelle
71% similar
rouille vs roulée
71% similar

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

Key facts for rouille
PropertyValue
Headwordrouille
LanguageFrench
Part of speechNoun
IPA\ʁuj\
Letters7
Frequency rank#19,664
Misspellings tracked7
Confusable pairs4
SourceWiktionary (kaikki.org)

Fréquence de l'aimant d'erreurs « rouille »

La fréquence va de la poignée de mots du quotidien (gauche) à la longue queue presque jamais vue (droite).rouillese place ici:

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

Les tics avancent en logarithme; chacun est de l'ordre de dix fois plus rare. Dans la même bande de rareté figurent « Roissy » (#19,663), « rouvrir » (#19,665), « rocket » (#19,662). Parmi 5,742 lemmes en « R », « rouille » est au #19,664. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 7 spelling variants around rouille (IPA \ʁuj\), anoun. Corpus frequency is #19,664 among 5,742 “R” headwords. Wiktionary lists 8 senses, so context still picks the gloss.

Our generated misspelling index lists 7 likely wrong-spelling variants for rouille, with forms such as "oruille", "roiulle", and "rouile". 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 4 confusable-pair relationships, "roulé", "ruelle", "roulée", and more, where similar look or sound leads writers to substitute one word for another in context.

Wiktionary doesn't record an etymology for this headword, so its spelling is best read as a straightforward mapping from sound to letter. The correct French form is rouille, spelled R-O-U-I-L-L-E.

Definition

  1. 1
    Matière friable, composée d’hydroxyde de fer, qui se forme sur les métaux ferreux par oxydation au contact de l’eau et de l’air.
  2. 2
    Le fait de se transformer en rouille, pour un objet en fer ou en acier. Le processus de transformation.
  3. 3
    Oxyde de cuivre et oxyde de quelques autres métaux.
  4. 4
    Les parties d’une glace où le tain est altéré, terni par l’humidité.
  5. 5
    Les causes d’altération, de dégradation, de vétusté.
  6. 6
    Couleur évoquant celle de la rouille.
  7. 7
    Sauce froide provençale qui accompagne la soupe de poisson ou la bouillabaisse.
  8. 8
    Maladie cryptogamique des végétaux supérieurs, dont il existe de nombreuses variantes.

Recorded use

Wiktionary examples

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

  1. La rouille mange, ronge le fer.
  2. La rouille du cuivre se nomme Vert-de-gris.

This word in other languages

rust(English)herrumbre(Español)Rost(Deutsch)ferrugem(Português)

Common misspellings

Also misspelled as:

  • oruille
  • roiulle
  • rouile
  • rouilel
  • roulile
  • rrouille
  • ruoille

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of rouille - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.

oruille2roiulle2rouile1rouilel2roulile2rrouille1ruoille2
Edit distance from "rouille"

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 French corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "rouille"?
"rouille" is spelled R-O-U-I-L-L-E. The IPA pronunciation is \ʁuj\.
What does "rouille" mean?
As a noun, "rouille" means: Matière friable, composée d’hydroxyde de fer, qui se forme sur les métaux ferreux par oxydation au contact de l’eau et de l’air.
What words are commonly confused with "rouille"?
"rouille" is commonly confused with "roulé", "ruelle", "roulée". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "rouille"?
The IPA (International Phonetic Alphabet) transcription for "rouille" is \ʁuj\. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What language does "rouille" come from?
"rouille" is a French word. PlainSpell covers definitions, pronunciations, and spelling data across English, Spanish, Portuguese, French, and German.
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 French words by spelling shape

Same letter count and similar misspelling depth for "rouille", not the corpus desk frequency band.

Same letter count

Frequency-ranked French headwords with 7 letters (nearest by frequency rank).

rouvrir#19,665régnait#19,673rejetés#19,649Socrate#19,684

Similar misspelling depth

Headwords with a similar count of attested misspellings (7 here; floor ≥5).

Roissy7 variantsRiley7 variantsrameau7 variantstapez7 variants

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

Source: FrequencyWords open word-frequency list