irradiation

/ɪˌɹeɪdiˈeɪʃən/

//ɪˌɹeɪdiˈeɪʃən// noun

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

"irradiation" is a 11-letter English headword indexed on PlainSpell.

The verdict

“irradiation” has 14 generated spelling variants in the English index at frequency #25,804. The variants make it a useful spelling check.

#25,804
frequency rank, English
2,140
“I” headwords
14
tracked misspellings

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - An act of irradiating, or state of being irradiated.

Corpus desk

Index EN-irradiation · irradiation · English

irradiation · rank #25,804 · 14 variants · 0 confusables

  • FREQ-MID #25,804
  • LEN-MEGA 11 letters
  • VOW-6 6 vowels
  • CONFUS-0 No pairs
  • VAR-HIGH 14 variants
  • BOOK-MID 2,140
  • PHOTO-FINISH irritable

Nearest frequency peer: irritable (+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.

Rank peers near misspelling magnet “irradiation”

Same rarity band: useful when a typo lands on a peer headword

corpus weight

What this shows “irradiation” sits among these FrequencyWords peers; misspelling depth is tracked separately in the edit-distance chart.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for irradiation
PropertyValue
Headwordirradiation
LanguageEnglish
Part of speechNoun
IPA/ɪˌɹeɪdiˈeɪʃən/
Letters11
Frequency rank#25,804
Misspellings tracked14
Confusable pairs0
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “irradiation”

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).irradiationlands here:

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

The axis is logarithmic, with each marked tick roughly ten times rarer than the last. Same rarity band neighbours include “irritable” (#25,805), “Jace” (#25,806), “interpreters” (#25,801). Among 2,140 “I” headwords, “irradiation” is #25,804. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 14 spelling variants around irradiation (IPA /ɪˌɹeɪdiˈeɪʃən/), anoun. Corpus frequency is #25,804 among 2,140 “I” headwords. Wiktionary lists 5 senses, so context still picks the gloss.

Our generated misspelling index lists 14 likely wrong-spelling variants for irradiation, with forms such as "iradiation", "irardiation", and "irradaition". 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. No confusable counterpart is on file for this word, since no other headword is close enough in sound or shape to pair with it.

Etymologically, the entry records: From Middle French irradiacion, from Latin irradiatio. Morphologically irradiate + -ion. The correct English form is irradiation, spelled I-R-R-A-D-I-A-T-I-O-N.

Definition

  1. 1
    An act of irradiating, or state of being irradiated.
  2. 2
    An act of irradiating, or state of being irradiated.
  3. 3
    illumination; irradiance; brilliance.
  4. 4
    mental light or illumination.
  5. 5
    The apparent enlargement of a bright object seen upon a dark ground, due to the fact that the portions of the retina around the image are stimulated by the intense light; as when a dark spot on a white ground appears smaller, or a white spot on a dark ground larger, than it really is, especially when a little out of focus.

Etymology

From Middle French irradiacion, from Latin irradiatio. Morphologically irradiate + -ion.

This word in other languages

irradiation(Français)Bestrahlung(Deutsch)irradiação(Português)

Common misspellings

Also misspelled as:

  • iradiation
  • irardiation
  • irradaition
  • irraddiation
  • irradiaiton
  • irradiasion
  • irradiatino
  • irradiationn
  • irradiatoin
  • irradiattion
  • irraditaion
  • irraidation
  • irrdaiation
  • riradiation

Misspelling Pattern Breakdown

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

iradiation1irardiation2irradaition2irraddiation1irradiaiton2irradiasion1irradiatino2irradiationn1
Edit distance from "irradiation"

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.

Frequently Asked Questions

How do you spell "irradiation"?
"irradiation" is spelled I-R-R-A-D-I-A-T-I-O-N. The IPA pronunciation is /ɪˌɹeɪdiˈeɪʃən/.
What does "irradiation" mean?
As a noun, "irradiation" means: An act of irradiating, or state of being irradiated.
What are common misspellings of "irradiation"?
Common misspellings include "iradiation", "irardiation", "irradaition", "irraddiation", "irradiaiton". The correct spelling is "irradiation".
How do you pronounce "irradiation"?
The IPA (International Phonetic Alphabet) transcription for "irradiation" is /ɪˌɹeɪdiˈeɪʃən/. 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 "irradiation"?
From Middle French irradiacion, from Latin irradiatio. Morphologically irradiate + -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 "irradiation", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 11 letters (nearest by frequency rank).

leaderboard#25,818maneuvering#25,835executioner#25,754exclamation#25,753

Similar misspelling depth

Headwords with a similar count of attested misspellings (14 here; floor ≥5).

indulgent14 variantsminiseries14 variantsexpressway14 variantsdiminutive14 variants

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

Source: FrequencyWords open word-frequency list