FIDEvsFTSEWhich spelling fits?

Which to use

“FIDE” and “FTSE” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#20,114
“FIDE” frequency rank
#38,851
“FTSE” frequency rank
58965
confusion score

Side-by-Side Comparison

Feature FIDE FTSE
Definition The International Chess Federation. Financial Times and Stock Exchange.

Where the eye mixes FIDE and FTSE

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

4 ch
FIDE
4 ch
FTSE

Why the eye confuses FIDE with FTSE

A purely visual mix-up. FIDE (/ˈfiːdeɪ/) and FTSE (/ˈfʊt.si/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 58965, derived from the frequency rank of both members and their visual similarity.

FIDE is recorded at frequency rank #20,114, classified as aname, pronounced /ˈfiːdeɪ/. FTSE is at rank #38,851, tagged as aname, pronounced /ˈfʊt.si/.

Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.

With a confusion score of 58965, this pair ranks #109,147 of 530,003 scored English confusable pairs - among the most confusable pairs.

Orthographic DNA of FIDE vs FTSE

Shared letters: ef. Private to "FIDE": di. Private to "FTSE": st.

"FIDE" · 4 letters · shape CVCV  ·  "FTSE" · 4 letters · shape CCCV

Known mistypes of this pair

  • FIDEfdie · ffide · fidde · fied · ifde
  • FTSEfftse · fste · ftes · ftsse · fttse · tfse

Frequently Asked Questions

Do "FIDE" and "FTSE" mean the same thing in a sentence?
No. They are said differently (/ˈfiːdeɪ/ versus /ˈfʊt.si/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Which is more common, "FIDE" or "FTSE"?
"FIDE" is the more common of the two: it sits at frequency rank #20,114 in our English list, against #38,851 for "FTSE". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "FIDE" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "FTSE" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #109,147 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "FIDE" and "FTSE" also get mixed up with nearby pairs, the highest-scored neighbour is "fie vs FTSE". Nearby pair
  • Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes

Confusion rank #109,147 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list