radio

/ˈɹeɪdiˌəʊ/

//ˈɹeɪdiˌəʊ// noun

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

"radio" is a 5-letter English headword indexed on PlainSpell.

The verdict

“radio” has 6 generated spelling variants in the English index at frequency #1,059. The variants make it a useful spelling check.

#1,059
frequency rank, English
3,094
“R” headwords
6
tracked misspellings
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The technology that allows for the transmission of sound or other signals by modulation of electromagnetic waves.

Corpus desk

Index EN-radio · radio · English

radio · rank #1,059 · 6 variants · 20 confusables

  • FREQ-COMMON #1,059
  • LEN-MID 5 letters
  • VOW-3 3 vowels
  • CONFUS-HIGH 20 pairs
  • VAR-MID 6 variants
  • BOOK-MID 3,094
  • PHOTO-FINISH pressure

Nearest frequency peer: pressure (-1 rank slots)

Read with this headword: Spelling guide for this pattern

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 “radio”

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

corpus weight

What this shows Bars show where “radio” sits against the nearest ranked English 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).

radio vs Rio
40% similar
radio vs Rao
40% similar
radio vs rain
60% similar

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

Key facts for radio
PropertyValue
Headwordradio
LanguageEnglish
Part of speechNoun
IPA/ˈɹeɪdiˌəʊ/
Letters5
Frequency rank#1,059
Misspellings tracked6
Confusable pairs20
SourceWiktionary (kaikki.org)

Where “radio” sits in English frequency

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right). radio lands here:

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

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 6 spelling variants around radio (IPA /ˈɹeɪdiˌəʊ/), anoun. Corpus frequency is #1,059 among 3,094 “R” headwords. Wiktionary lists 5 senses, so context still picks the gloss.

Our generated misspelling index lists 6 likely wrong-spelling variants for radio, with forms such as "ardio", "raddio", and "radoi". 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 20 confusable-pair relationships, "Rio", "Rao", "rain", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.

Etymologically, the entry records: Short for radiotelegraphy. The correct English form is radio, spelled R-A-D-I-O.

Definition

  1. 1
    The technology that allows for the transmission of sound or other signals by modulation of electromagnetic waves.
  2. 2
    A device that can capture (receive) the signal sent over radio waves and render the modulated signal as sound.
  3. 3
    Any audio playing device, such as the on-board entertainment system in a car, usually including a radio receiver as well as the capability to play audio from recorded media; see also car radio.
  4. 4
    A device that can transmit radio signals.
  5. 5
    The continuous broadcasting of sound via the Internet in the style of traditional radio.

Recorded use

Wiktionary examples

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

  1. send a message by radio
  2. We heard a lovely song on the radio.

Etymology

Short for radiotelegraphy.

Synonyms

tunerwirelessreceiver

This word in other languages

radio(Español)radio(Français)Radio(Deutsch)rádio(Português)

Common misspellings

Also misspelled as:

  • ardio
  • raddio
  • radoi
  • raido
  • rdaio
  • rradio

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of radio - 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.

ardio2raddio1radoi2raido2rdaio2rradio1
Edit distance from "radio"

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

PlainSpell is rendered directly from structured Wiktionary extracts and open word-frequency lists, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of September 3, 2026. Primary sources: Wiktionary (via kaikki.org) and FrequencyWords.

Frequently Asked Questions

How do you spell "radio"?
"radio" is spelled R-A-D-I-O. The IPA pronunciation is /ˈɹeɪdiˌəʊ/.
What does "radio" mean?
As a noun, "radio" means: The technology that allows for the transmission of sound or other signals by modulation of electromagnetic waves.
What words are commonly confused with "radio"?
"radio" is commonly confused with "Rio", "Rao", "rain". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "radio"?
The IPA (International Phonetic Alphabet) transcription for "radio" is /ˈɹeɪdiˌəʊ/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "radio"?
Short for radiotelegraphy. See the full etymology section above for more details.
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 English words by spelling shape

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

Same letter count

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

plans#1,055moved#1,053cross#1,073brown#1,043

Similar misspelling depth

Headwords with a similar count of attested misspellings (6 here; floor ≥5).

text6 variantsahead6 variantskept6 variantspeace6 variants

What to do next

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

  • "radio" maps to 20 confusable pairs in this vintage; the highest-scored is "Rio". View pair
  • 6 edit-distance misspelling variants are generated for spell-check research on this headword. See variants
  • Usage frequency rank #1,059 among English headwords in this corpus. Corpus statistics
  • Browse more English words in the "R" letter cohort. R–Z browse
  • PlainSpell rotates a curated Word of the Day from the English corpus, a passive way to discover vocabulary. Word of the Day

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