radiation

/ˌɹeɪ.diˈeɪ.ʃən/

//ˌɹeɪ.diˈeɪ.ʃən// noun

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

"radiation" is a 9-letter English headword indexed on PlainSpell.

The verdict

“radiation” has 13 generated spelling variants in the English index at frequency #4,552. The variants make it a useful spelling check.

#4,552
frequency rank, English
3,094
“R” headwords
13
tracked misspellings
1
confusable pair

According to Wiktionary data (CC BY-SA, analyzed September 2, 2026) - The shooting forth of anything from a point or surface, like diverging rays of light.

Corpus desk

Index EN-radiation · radiation · English

radiation · rank #4,552 · 13 variants · 1 confusable

  • FREQ-COMMON #4,552
  • LEN-LONG 9 letters
  • VOW-5 5 vowels
  • CONFUS-LOW 1 pairs
  • VAR-HIGH 13 variants
  • BOOK-MID 3,094
  • PHOTO-FINISH quest

Nearest frequency peer: quest (-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 “radiation”

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

corpus weight

What this shows Bars show where “radiation” 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 2, 2026

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

radiation vs radiator
78% similar

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

Key facts for radiation
PropertyValue
Headwordradiation
LanguageEnglish
Part of speechNoun
IPA/ˌɹeɪ.diˈeɪ.ʃən/
Letters9
Frequency rank#4,552
Misspellings tracked13
Confusable pairs1
SourceWiktionary (kaikki.org)

Where “radiation” 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). radiation 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 13 spelling variants around radiation (IPA /ˌɹeɪ.diˈeɪ.ʃən/), anoun. Corpus frequency is #4,552 among 3,094 “R” headwords. Wiktionary lists 6 senses, so context still picks the gloss.

Our generated misspelling index lists 13 likely wrong-spelling variants for radiation, with forms such as "ardiation", "radaition", and "raddiation". 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 1 confusable-pair relationship, "radiator", since the words sound or look close enough that writers reach for the wrong one mid-sentence.

Etymologically, the entry records: Borrowed from Latin radiatio, radiationis. By surface analysis, radiate + -ion. The correct English form is radiation, spelled R-A-D-I-A-T-I-O-N.

Definition

  1. 1
    The shooting forth of anything from a point or surface, like diverging rays of light.
  2. 2
    The shooting forth of anything from a point or surface, like diverging rays of light.
  3. 3
    The process of radiating waves or particles.
  4. 4
    The transfer of energy via radiation.
  5. 5
    Radioactive energy.
  6. 6
    A rapid diversification of an ancestral species into many new forms.

Recorded use

Wiktionary examples

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

  1. The radiation of love from the crowd was addictive to the young singer-songwriters.
  2. heat radiation

Etymology

Borrowed from Latin radiatio, radiationis. By surface analysis, radiate + -ion.

This word in other languages

radiación(Español)radiation(Français)Strahlung(Deutsch)irradiação(Português)

Common misspellings

Also misspelled as:

  • ardiation
  • radaition
  • raddiation
  • radiaiton
  • radiasion
  • radiatino
  • radiationn
  • radiatoin
  • radiattion
  • raditaion
  • raidation
  • rdaiation
  • rradiation

Misspelling Pattern Breakdown

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

ardiation2radaition2raddiation1radiaiton2radiasion1radiatino2radiationn1radiatoin2
Edit distance from "radiation"

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 2, 2026. Primary sources: Wiktionary (via kaikki.org) and FrequencyWords.

Frequently Asked Questions

How do you spell "radiation"?
"radiation" is spelled R-A-D-I-A-T-I-O-N. The IPA pronunciation is /ˌɹeɪ.diˈeɪ.ʃən/.
What does "radiation" mean?
As a noun, "radiation" means: The shooting forth of anything from a point or surface, like diverging rays of light.
What words are commonly confused with "radiation"?
"radiation" is commonly confused with "radiator". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "radiation"?
The IPA (International Phonetic Alphabet) transcription for "radiation" is /ˌɹeɪ.diˈeɪ.ʃən/. 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 "radiation"?
Borrowed from Latin radiatio, radiationis. By surface analysis, radiate + -ion. 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 "radiation", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 9 letters (nearest by frequency rank).

traveling#4,561mechanism#4,540addressed#4,570hilarious#4,531

Similar misspelling depth

Headwords with a similar count of attested misspellings (13 here; floor ≥5).

Maryland13 variantsclassified13 variantschurches13 variantsencounter13 variants
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