once

\ɔ̃s\

/\ɔ̃s\/ noun

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

The verdict

“once” sits in 20 confusable pairs (corpus #11,815) as a noun. The look-alike neighbours are the real trap.

#11,815
frequency rank, French
1,642
“O” headwords
4
tracked misspellings
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Unité de mesure de la masse (système impérial britannique avoirdupois), qui vaut 28,3495231 grammes pour l'once commune → voir ounce. Ses symboles sont oz et ℥. L'once troy (troy ounce) équivaut po...

Corpus desk

Index FR-once · once · French

once · rank #11,815 · 4 variants · 20 confusables

  • FREQ-MID #11,815
  • LEN-MID 4 letters
  • VOW-2 2 vowels
  • CONFUS-HIGH 20 pairs
  • VAR-LOW 4 variants
  • BOOK-MID 1,642
  • PHOTO-FINISH occupants

Nearest frequency peer: occupants (-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.

Frequency neighbourhood for “once”

Lower corpus rank = more everyday usage (inverted bar length for readability)

corpus weight

What this shows Bars show where “once” sits against the nearest ranked French headwords in the FrequencyWords band, not a reprint of letter-browse containment.

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).

once vs ont
50% similar
once vs one
75% similar
once vs ose
50% similar

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

Key facts for once
PropertyValue
Headwordonce
LanguageFrench
Part of speechNoun
IPA\ɔ̃s\
Letters4
Frequency rank#11,815
Misspellings tracked4
Confusable pairs20
SourceWiktionary (kaikki.org)

Où “once” se place dans la fréquence du français

Cette échelle va du noyau du français courant (gauche) jusqu'à la traîne des formes rares (droite).oncese place ici:

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

L'axe est logarithmique: chaque tic marque environ dix fois moins de fréquence. Dans la même bande de rareté figurent « occupants » (#11,814), « only » (#11,816), « Noah » (#11,813). Source: FrequencyWords open word-frequency list.

Easy to mix with look-alikes

The spelling risk for once is neighbouring look-alikes ("ont", "one", …), not just typos; it is anoun pronounced \ɔ̃s\. Frequency #11,815 among 1,642 “O” headwords. 5 recorded senses keep meaning in play.

Our generated misspelling index lists 4 likely wrong-spelling variants for once, with forms such as "ocne", "oncce", and "onec". Each variant is a distinct typo pattern an edit-distance generator flags, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution. It also participates in 20 confusable-pair relationships, "ont", "one", "ose", and more, where similar look or sound leads writers to substitute one word for another in context.

No explicit etymology string is stored for this entry, so its spelling pattern is best understood through pronunciation rather than a traceable origin. The correct French form is once, spelled O-N-C-E.

Definition

  1. 1
    Unité de mesure de la masse (système impérial britannique avoirdupois), qui vaut 28,3495231 grammes pour l'once commune → voir ounce. Ses symboles sont oz et ℥. L'once troy (troy ounce) équivaut pour sa part à 31,1034768 grammes.
  2. 2
    Ancien poids qui valait la douzième partie de la livre romaine.
  3. 3
    Ancienne unité de mesure de masse en France, qui valait 30,59 grammes. Elle formait la huitième partie du marc, ou la seizième partie de la livre de Paris. Parfois encore utilisée pour peser l’or par exemple.
  4. 4
    Petite quantité de quelque chose.
  5. 5
    Ancienne monnaie d’or ayant eu cours en Espagne et en Amérique latine.

Recorded use

Wiktionary examples

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

  1. Cependant n’accède pas tout de suite à leur demande ; car la qualité reconnue de ce peuple maudit est de commencer par exiger des livres et de finir par accepter des onces.
  2. Renaud leva ses bras maigres que les gants de six onces garnissaient comme deux paquets de pansement et sourit.

This word in other languages

ounce(English)onza(Español)Unze(Deutsch)

Common misspellings

Also misspelled as:

  • ocne
  • oncce
  • onec
  • onnce

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of once - expressed in single-character edits (insert, delete, or swap one letter). Bigger bars stand out at a glance; a one-edit slip is the hardest to catch.

ocne2oncce1onec2onnce1
Edit distance from "once"

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 "once"?
"once" is spelled O-N-C-E. The IPA pronunciation is \ɔ̃s\.
What does "once" mean?
As a noun, "once" means: Unité de mesure de la masse (système impérial britannique avoirdupois), qui vaut 28,3495231 grammes pour l'once commune → voir ounce. Ses symboles sont oz et ℥. L'once troy (troy ounce) équivaut po...
What words are commonly confused with "once"?
"once" is commonly confused with "ont", "one", "ose". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "once"?
The IPA (International Phonetic Alphabet) transcription for "once" is \ɔ̃s\. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What language does "once" come from?
"once" 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 "once", not the corpus desk frequency band.

Same letter count

Frequency-ranked French headwords with 4 letters (nearest by frequency rank).

only#11,816Noah#11,813lily#11,800Liam#11,799

What to do next

You've looked up "once". Here's where to go from here.

  • "once" maps to 20 confusable pairs in this vintage; the highest-scored is "ont". View pair
  • 4 edit-distance misspelling variants are generated for spell-check research on this headword. See variants
  • Usage frequency rank #11,815 among French headwords in this corpus. Corpus statistics
  • Browse more French words in the "O" letter cohort. O–Z browse

PlainSpell is a reference corpus, not spelling advice. Verify unusual forms in context.

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.

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

Source: FrequencyWords open word-frequency list