efficace

\e.fi.kas\

/\e.fi.kas\/ adj

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

The verdict

“efficace” has 9 generated spelling variants in the French index at frequency #1,914. The variants make it a useful spelling check.

#1,914
frequency rank, French
3,255
“E” headwords
9
tracked misspellings
3
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Qui produit son effet.

Corpus desk

Index FR-efficace · efficace · French

efficace · rank #1,914 · 9 variants · 3 confusables

  • FREQ-COMMON #1,914
  • LEN-LONG 8 letters
  • VOW-4 4 vowels
  • CONFUS-LOW 3 pairs
  • VAR-MID 9 variants
  • BOOK-MID 3,255
  • PHOTO-FINISH dure

Nearest frequency peer: dure (-2 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 « efficace »

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

corpus weight

What this shows « efficace » 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).

efficace vs efficaces
89% similar
efficace vs efficacité
70% similar
efficace vs efface
75% similar

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

Key facts for efficace
PropertyValue
Headwordefficace
LanguageFrench
Part of speechAdjective
IPA\e.fi.kas\
Letters8
Frequency rank#1,914
Misspellings tracked9
Confusable pairs3
SourceWiktionary (kaikki.org)

Fréquence de l'aimant d'erreurs « efficace »

De gauche à droite: le peu qui porte la parole quotidienne, puis la longue queue quasi invisible.efficacese 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 « dure » (#1,912), « européens » (#1,916), « difficultés » (#1,911). Parmi 3,255 lemmes en « E », « efficace » est au #1,914. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 9 spelling variants around efficace (IPA \e.fi.kas\), anadjective. Corpus frequency is #1,914 among 3,255 “E” headwords. Wiktionary lists 3 senses, so context still picks the gloss.

Our generated misspelling index lists 9 likely wrong-spelling variants for efficace, with forms such as "effciace", "effiacce", and "efficacce". 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 3 confusable-pair relationships, "efficaces", "efficacité", "efface", a pairing that trips writers up because the two words share enough sound or shape to blur together.

No borrowing history is documented for this entry, so spelling patterns must be inferred from the word's phoneme-to-grapheme mapping rather than from a documented borrowing chain. The correct French form is efficace, spelled E-F-F-I-C-A-C-E.

Definition

  1. 1
    Qui produit son effet.
  2. 2
    Qualifie la moyenne quadratique d'une mesure électrique d'un courant alternatif.
  3. 3
    Qui a toujours son effet.

Recorded use

Wiktionary examples

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

  1. L’action des herbivores peut être efficace par leur influence sur le chimisme du sol ; le cas est très net dans les pâturages de montagne.
  2. Tous les autres procédés imaginés jusqu'à ce jour, jouent simplement le rôle de dégrossisseurs plus ou moins efficaces.

Synonyms

performantefficientproductifrentablefructueuxeffectif

Antonyms

inefficaceimproductifinfructueuxvainstérilecontre-productif

This word in other languages

effective(English)eficaz(Español)wirksam(Deutsch)eficaz(Português)

Common misspellings

Also misspelled as:

  • effciace
  • effiacce
  • efficacce
  • efficaec
  • efficcace
  • efficcae
  • eficace
  • efifcace
  • feficace

Misspelling Pattern Breakdown

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

effciace2effiacce2efficacce1efficaec2efficcace1efficcae2eficace1efifcace2
Edit distance from "efficace"

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 "efficace"?
"efficace" is spelled E-F-F-I-C-A-C-E. The IPA pronunciation is \e.fi.kas\.
What does "efficace" mean?
As an adjective, "efficace" means: Qui produit son effet.
What words are commonly confused with "efficace"?
"efficace" is commonly confused with "efficaces", "efficacité", "efface". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "efficace"?
The IPA (International Phonetic Alphabet) transcription for "efficace" is \e.fi.kas\. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What language does "efficace" come from?
"efficace" is a French word. You can look up definitions, pronunciations, and spelling data for this and other words across English, Spanish, Portuguese, French, and German on PlainSpell.
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 "efficace", not the corpus desk frequency band.

Same letter count

Frequency-ranked French headwords with 8 letters (nearest by frequency rank).

interdit#1,920champion#1,903soutenir#1,936suivante#1,937

Similar misspelling depth

Headwords with a similar count of attested misspellings (9 here; floor ≥5).

garçon9 variantséchelle9 variantsphrase9 variantschiffre9 variants

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

Source: FrequencyWords open word-frequency list