once

/ˈɔnθe/

//ˈɔnθe// num

The verdict

“once” sits in 14 confusable pairs (corpus #12,301) as a numeral. The look-alike neighbours are the real trap.

#12,301
frequency rank, Portuguese
385
“O” headwords
4
tracked misspellings
14
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - onze

Corpus desk

Index PT-once · once · Portuguese

once · rank #12,301 · 4 variants · 14 confusables

  • FREQ-MID #12,301
  • LEN-MID 4 letters
  • VOW-2 2 vowels
  • CONFUS-MID 14 pairs
  • VAR-LOW 4 variants
  • BOOK-MID 385
  • PHOTO-FINISH ocular

Nearest frequency peer: ocular (-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.

Vizinhos de frequência do confusável “once”

Pares de peso semelhante no corpus, aparte dos confusáveis abaixo

corpus weight

What this shows As barras situam “once” face aos lemas portugueses mais próximos por rank, não um reprint da secretária de confusáveis.

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 one
75% similar
once vs ONU
0% similar
once vs ono
50% similar

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

Key facts for once
PropertyValue
Headwordonce
LanguagePortuguese
Part of speechNumeral
IPA/ˈɔnθe/
Letters4
Frequency rank#12,301
Misspellings tracked4
Confusable pairs14
SourceWiktionary (kaikki.org)

Rank de corpus junto a confusáveis de “once”

Esta escala corre do núcleo do português quotidiano (esquerda) até o rastro de formas raras (direita).oncecai aqui:

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

O eixo é logarítmico: cada tick marca cerca de dez vezes menos frequência. Na mesma faixa de raridade aparecem “ocular” (#12,299), “otário” (#12,303), “nacionalismo” (#12,298). Entre 385 lemas com “O”, “once” fica em #12,301. Source: FrequencyWords open word-frequency list.

Easy to mix with look-alikes

The spelling risk for once is neighbouring look-alikes ("one", "ONU", …), not just typos; it is anumeral pronounced /ˈɔnθe/. Frequency #12,301 among 385 “O” headwords. Gloss: "onze".

Our generated misspelling index lists 4 likely wrong-spelling variants for once, with forms such as "noce", "oncce", and "onec". 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 14 confusable-pair relationships, "one", "ONU", "ono", 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 is easiest to reason about phoneme by phoneme, absent a documented history. The correct Portuguese form is once, spelled O-N-C-E.

Definition

  1. 1
    onze

Common misspellings

Also misspelled as:

  • noce
  • oncce
  • onec
  • onnce

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of once - counted as single-character edits (an insertion, a deletion, or a substituted letter). The larger the bar, the easier the typo is to spot; one-edit slips are the ones that sneak past readers.

noce2oncce1onec2onnce1
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 Portuguese 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 /ˈɔnθe/.
What does "once" mean?
As a numeral, "once" means: onze
What words are commonly confused with "once"?
"once" is commonly confused with "one", "ONU", "ono". 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 /ˈɔnθe/. 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 Portuguese word. PlainSpell's reference spans five languages -- English, Spanish, Portuguese, French, and German -- with definitions, pronunciations, and spelling data for each.
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 Portuguese words by spelling shape

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

Same letter count

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

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

Source: FrequencyWords open word-frequency list