fallout

/ˈfɔːlaʊt/

//ˈfɔːlaʊt// noun

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

"fallout" is a 7-letter English headword indexed on PlainSpell.

The verdict

“fallout” has 8 generated spelling variants in the English index at frequency #11,378. The variants make it a useful spelling check.

#11,378
frequency rank, English
2,507
“F” headwords
8
tracked misspellings
3
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The event of small airborne particles falling to the ground in significant quantities as a result of major industrial activity, volcano eruption, sandstorm, nuclear explosion, etc.

Corpus desk

Index EN-fallout · fallout · English

fallout · rank #11,378 · 8 variants · 3 confusables

  • FREQ-MID #11,378
  • LEN-LONG 7 letters
  • VOW-3 3 vowels
  • CONFUS-LOW 3 pairs
  • VAR-MID 8 variants
  • BOOK-MID 2,507
  • PHOTO-FINISH feather

Nearest frequency peer: feather (+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 “fallout”

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

corpus weight

What this shows “fallout” 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

Visual similarity to commonly confused words

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

fallout vs fallow
71% similar
fallout vs Falmouth
63% similar
fallout vs Fallon
57% similar

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

Key facts for fallout
PropertyValue
Headwordfallout
LanguageEnglish
Part of speechNoun
IPA/ˈfɔːlaʊt/
Letters7
Frequency rank#11,378
Misspellings tracked8
Confusable pairs3
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “fallout”

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

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

Ticks step logarithmically, so each one marks a roughly tenfold drop in how often the word turns up. Same rarity band neighbours include “feather” (#11,379), “Exodus” (#11,376), “figuring” (#11,380). Among 2,507 “F” headwords, “fallout” is #11,378. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 8 spelling variants around fallout (IPA /ˈfɔːlaʊt/), anoun. Corpus frequency is #11,378 among 2,507 “F” headwords. Wiktionary lists 6 senses, so context still picks the gloss.

Our generated misspelling index lists 8 likely wrong-spelling variants for fallout, with forms such as "afllout", "fallotu", and "falloutt". 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 3 confusable-pair relationships, "fallow", "Falmouth", "Fallon", where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: Deverbal from fall out; fall + out. The correct English form is fallout, spelled F-A-L-L-O-U-T.

Definition

  1. 1
    The event of small airborne particles falling to the ground in significant quantities as a result of major industrial activity, volcano eruption, sandstorm, nuclear explosion, etc.
  2. 2
    The particles themselves.
  3. 3
    A negative side effect; an undesirable or unexpected consequence.
  4. 4
    A declined offer in a sales transaction when acceptance was presumed.
  5. 5
    The person who declines such an offer.
  6. 6
    An impromptu guest used to fill in for another guest spot who is a no-show or who has cancelled last minute.

Recorded use

Wiktionary examples

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

  1. It was 5 February 2010 and Safdar had already dealt with the fallout of one explosion that day: an hour before, a motorbike laden with explosives had slammed into a bus carrying Shia Muslims to a religious procession.
  2. On 26 April 1986 the reactor number four at the Chernobyl Nuclear Power Plant located in the Soviet Union near Pripyat in Ukraine exploded. Further explosions and the resulting fire sent a plume of highly radioactive fallout into the atmosphere and over an extensive geographical area.

Etymology

Deverbal from fall out; fall + out.

This word in other languages

lluvia(Español)retombées(Français)Niederschlag(Deutsch)precipitação(Português)

Common misspellings

Also misspelled as:

  • afllout
  • fallotu
  • falloutt
  • falluot
  • falolut
  • falout
  • ffallout
  • flalout

Misspelling Pattern Breakdown

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

afllout2fallotu2falloutt1falluot2falolut2falout1ffallout1flalout2
Edit distance from "fallout"

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 "fallout"?
"fallout" is spelled F-A-L-L-O-U-T. The IPA pronunciation is /ˈfɔːlaʊt/.
What does "fallout" mean?
As a noun, "fallout" means: The event of small airborne particles falling to the ground in significant quantities as a result of major industrial activity, volcano eruption, sandstorm, nuclear explosion, etc.
What words are commonly confused with "fallout"?
"fallout" is commonly confused with "fallow", "Falmouth", "Fallon". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "fallout"?
The IPA (International Phonetic Alphabet) transcription for "fallout" is /ˈfɔːlaʊt/. 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 "fallout"?
Deverbal from fall out; fall + out. 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 "fallout", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 7 letters (nearest by frequency rank).

feather#11,379firearm#11,382drained#11,371Daniels#11,366

Similar misspelling depth

Headwords with a similar count of attested misspellings (8 here; floor ≥5).

Exodus8 variantsflock8 variantshoused8 variantscoated8 variants

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

Source: FrequencyWords open word-frequency list