French disease

noun

"french-disease" is a 13-letter English headword indexed on PlainSpell.

The verdict

“French disease” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.

Unranked
below top-frequency English
14
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Syphilis.

Corpus desk

Index EN-french-disease · French disease · English

French disease · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MEGA 14 letters
  • VOW-5 5 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "F" thin
  • PHOTO-UNK Peer pending

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.

Key facts for French disease
PropertyValue
HeadwordFrench disease
LanguageEnglish
Part of speechNoun
Letters14
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “French disease” in English

French diseaseranks outside the top 100,000 English headwords, in the long tail of specialist, archaic, or seldom-used vocabulary, exactly the territory where a reader stops mid-sentence to double-check spelling.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

French disease is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "Syphilis.".

Our edit-distance generator produced no likely misspellings for French disease, and the word's spelling is regular enough that our generator found nothing worth flagging. No close-neighbour confusable shows up for this headword in our dataset, since its spelling is unusual enough that it doesn't cluster with a lookalike.

Etymologically, the entry records: So called because it was spread by returning French troops in mediaeval times. The correct English form is French disease, spelled F-R-E-N-C-H- -D-I-S-E-A-S-E.

Definition

  1. 1
    Syphilis.

Recorded use

Wiktionary example

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

  1. Although the Inquisition trials dealing with the French disease are few in number, the cases provide competing opinions about the cause of illness, thereby providing some insights into how the categories of natural and supernatural[…]

Etymology

So called because it was spread by returning French troops in mediaeval times.

This word in other languages

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "French disease"?
"French disease" is spelled F-R-E-N-C-H- -D-I-S-E-A-S-E.
What does "French disease" mean?
As a noun, "French disease" means: Syphilis.
What is the origin of the word "French disease"?
So called because it was spread by returning French troops in mediaeval times. 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.

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

Source: FrequencyWords open word-frequency list