fallacious

/fəˈleɪ.ʃəs/

//fəˈleɪ.ʃəs// adj

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

"fallacious" is a 10-letter English headword indexed on PlainSpell.

The verdict

“fallacious” has 12 generated spelling variants in the English index at frequency #44,772. The variants make it a useful spelling check.

#44,772
frequency rank, English
2,507
“F” headwords
12
tracked misspellings

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Characterized by fallacy; false or mistaken.

Corpus desk

Index EN-fallacious · fallacious · English

fallacious · rank #44,772 · 12 variants · 0 confusables

  • FREQ-MID #44,772
  • LEN-MEGA 10 letters
  • VOW-5 5 vowels
  • CONFUS-0 No pairs
  • VAR-MID 12 variants
  • BOOK-MID 2,507
  • PHOTO-FINISH falafel

Nearest frequency peer: falafel (-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 “fallacious”

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

corpus weight

What this shows “fallacious” 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 fallacious
PropertyValue
Headwordfallacious
LanguageEnglish
Part of speechAdjective
IPA/fəˈleɪ.ʃəs/
Letters10
Frequency rank#44,772
Misspellings tracked12
Confusable pairs0
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “fallacious”

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).fallaciouslands here:

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

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “falafel” (#44,771), “Falstaff” (#44,773), “FANBOYS” (#44,775). Among 2,507 “F” headwords, “fallacious” is #44,772. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 12 spelling variants around fallacious (IPA /fəˈleɪ.ʃəs/), anadjective. Corpus frequency is #44,772 among 2,507 “F” headwords. Wiktionary lists 2 senses, so context still picks the gloss.

Our generated misspelling index lists 12 likely wrong-spelling variants for fallacious, with forms such as "afllacious", "falacious", and "falalcious". 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. Our confusable-pair dataset has no match for it, which tends to mean the word is visually distinctive enough to stand on its own.

Etymologically, the entry records: From Middle English fallacious; equivalent to fallacy + -ous. The correct English form is fallacious, spelled F-A-L-L-A-C-I-O-U-S.

Definition

  1. 1
    Characterized by fallacy; false or mistaken.
  2. 2
    Deceptive or misleading.

Recorded use

Wiktionary example

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

  1. There is a widely diffused notion that among all specimens of animal creation man alone possesses any glimmering of reason. This notion is largely fallacious. It is one of those ideas, based upon superficial knowledge, which appeal to the sophisticated modern public.

Etymology

From Middle English fallacious; equivalent to fallacy + -ous.

This word in other languages

erróneo(Español)fallacieux(Français)irreführend(Deutsch)falacioso(Português)

Common misspellings

Also misspelled as:

  • afllacious
  • falacious
  • falalcious
  • fallaccious
  • fallaciosu
  • fallaciouss
  • fallaciuos
  • fallacoius
  • fallaicous
  • fallcaious
  • ffallacious
  • flalacious

Misspelling Pattern Breakdown

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

afllacious2falacious1falalcious2fallaccious1fallaciosu2fallaciouss1fallaciuos2fallacoius2
Edit distance from "fallacious"

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 "fallacious"?
"fallacious" is spelled F-A-L-L-A-C-I-O-U-S. The IPA pronunciation is /fəˈleɪ.ʃəs/.
What does "fallacious" mean?
As an adjective, "fallacious" means: Characterized by fallacy; false or mistaken.
What are common misspellings of "fallacious"?
Common misspellings include "afllacious", "falacious", "falalcious", "fallaccious", "fallaciosu". The correct spelling is "fallacious".
How do you pronounce "fallacious"?
The IPA (International Phonetic Alphabet) transcription for "fallacious" is /fəˈleɪ.ʃəs/. 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 "fallacious"?
From Middle English fallacious; equivalent to fallacy + -ous. 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 "fallacious", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 10 letters (nearest by frequency rank).

fastidious#44,777elongation#44,757Düsseldorf#44,752dominatrix#44,746

Similar misspelling depth

Headwords with a similar count of attested misspellings (12 here; floor ≥5).

Euripides12 variantsescapism12 variantsenthused12 variantsflagpole12 variants

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

Source: FrequencyWords open word-frequency list