radon

/ʀadɔ͂/

//ʀadɔ͂// noun

The verdict

“radon” is uncommon Portuguese (frequency #94,156 among 963 “R” headwords), classed as a noun. The kind of spelling people second-guess.

#94,156
frequency rank, Portuguese
963
“R” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - radão/radônio

Corpus desk

Index PT-radon · radon · Portuguese

radon · rank #94,156 · 0 variants · 0 confusables

  • FREQ-RARE #94,156
  • LEN-MID 5 letters
  • VOW-2 2 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 963
  • PHOTO-FINISH Publius

Nearest frequency peer: Publius (-8 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.

Ranks da cauda longa perto de “radon”

Faixa escassa: as barras invertem o rank para o raro ler-se mais curto

corpus weight

What this shows Vista da cauda longa: onde “radon” se situa face a ranks portugueses igualmente raros.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for radon
PropertyValue
Headwordradon
LanguagePortuguese
Part of speechNoun
IPA/ʀadɔ͂/
Letters5
Frequency rank#94,156
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Cauda longa: rank de “radon” em português

A frequência vai do punhado de palavras do dia a dia (esquerda) à cauda longa quase nunca usada (direita).radoncai nesta cauda de raridade:

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

Os ticks avançam em logaritmo; cada um é da ordem de dez vezes mais raro. Vizinhos raros da mesma faixa: “Publius” (#94,148), “psicadélico” (#94,145), “premeditação” (#94,127). Entre 963 lemas com “R”, “radon” fica em #94,156. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

radon is uncommon Portuguese at frequency #94,156 among 963 “R” headwords, classed as anoun, transcribed /ʀadɔ͂/. Rarity is why readers land here mid-draft. Gloss: "radão/radônio".

The misspelling generator found no plausible variants for radon, typically a sign the spelling maps closely to how the word sounds. Our dataset records no confusable match here, a sign it's visually distinctive enough not to be mixed up with another word.

This entry carries no recorded etymology, so its spelling is best explained by sound-to-letter mapping rather than etymology. The correct Portuguese form is radon, spelled R-A-D-O-N.

Definition

  1. 1
    radão/radônio

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 "radon"?
"radon" is spelled R-A-D-O-N. The IPA pronunciation is /ʀadɔ͂/.
What does "radon" mean?
As a noun, "radon" means: radão/radônio
How do you pronounce "radon"?
The IPA (International Phonetic Alphabet) transcription for "radon" is /ʀadɔ͂/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What language does "radon" come from?
"radon" is a Portuguese 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 Portuguese words by spelling shape

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

Same letter count

Frequency-ranked Portuguese headwords with 5 letters (nearest by frequency rank).

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

Source: FrequencyWords open word-frequency list