flak

/flæk/

//flæk// noun

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

"flak" is a 4-letter English headword indexed on PlainSpell.

The verdict

“flak” has 5 generated spelling variants in the English index at frequency #26,792. The variants make it a useful spelling check.

#26,792
frequency rank, English
2,507
“F” headwords
5
tracked misspellings
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Ground-based anti-aircraft guns firing explosive shells.

Corpus desk

Index EN-flak · flak · English

flak · rank #26,792 · 5 variants · 20 confusables

  • FREQ-MID #26,792
  • LEN-MID 4 letters
  • VOW-1 1 vowel
  • CONFUS-HIGH 20 pairs
  • VAR-MID 5 variants
  • BOOK-MID 2,507
  • PHOTO-FINISH Finley

Nearest frequency peer: Finley (-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 “flak”

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

corpus weight

What this shows “flak” 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).

flak vs fly
50% similar
flak vs flu
50% similar
flak vs Flo
25% similar

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

Key facts for flak
PropertyValue
Headwordflak
LanguageEnglish
Part of speechNoun
IPA/flæk/
Letters4
Frequency rank#26,792
Misspellings tracked5
Confusable pairs20
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “flak”

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right).flaklands 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 “Finley” (#26,791), “flamboyant” (#26,793), “Fillers” (#26,790). Among 2,507 “F” headwords, “flak” is #26,792. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 5 spelling variants around flak (IPA /flæk/), anoun. Corpus frequency is #26,792 among 2,507 “F” headwords. Wiktionary lists 4 senses, so context still picks the gloss.

Our generated misspelling index lists 5 likely wrong-spelling variants for flak, with forms such as "fflak", "flakk", and "flka". 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, "fly", "flu", "Flo", and more, where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: Borrowed from German FlaK, short for Fliegerabwehrkanone (“anti airplane cannon”). The correct English form is flak, spelled F-L-A-K.

Definition

  1. 1
    Ground-based anti-aircraft guns firing explosive shells.
  2. 2
    Anti-aircraft shell fire.
  3. 3
    Adverse criticism.
  4. 4
    A public-relations spokesperson.

Recorded use

Wiktionary examples

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

  1. Another peculiar modern development is that of […] military abbreviations in army orders such as Flak ('Fliegerabwehrkanone' or 'archie')[.]
  2. […] to consider whether the city was in February 1945 an undefended city within the meaning of the 1907 Hague Convention, it will be necessary to examine the establishment and subsequent total dispersal of the city's flak batteries, before the date of the triple blow.

Etymology

Borrowed from German FlaK, short for Fliegerabwehrkanone (“anti airplane cannon”).

This word in other languages

DCA(Français)Fliegerabwehrkanone(Deutsch)crítica(Português)

Common misspellings

Also misspelled as:

  • fflak
  • flakk
  • flka
  • fllak
  • lfak

Misspelling Pattern Breakdown

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

fflak1flakk1flka2fllak1lfak2
Edit distance from "flak"

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 "flak"?
"flak" is spelled F-L-A-K. The IPA pronunciation is /flæk/.
What does "flak" mean?
As a noun, "flak" means: Ground-based anti-aircraft guns firing explosive shells.
What words are commonly confused with "flak"?
"flak" is commonly confused with "fly", "flu", "Flo". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "flak"?
The IPA (International Phonetic Alphabet) transcription for "flak" is /flæk/. 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 "flak"?
Borrowed from German FlaK, short for Fliegerabwehrkanone (“anti airplane cannon”). 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 "flak", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 4 letters (nearest by frequency rank).

Frey#26,800fuzz#26,802gout#26,806hoof#26,820

Similar misspelling depth

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

fatter5 variantshues5 variantsHuey5 variantsJana5 variants

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

Source: FrequencyWords open word-frequency list