fidelity

/fɪˈdɛl.ɪ.ti/

//fɪˈdɛl.ɪ.ti// noun

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

"fidelity" is a 8-letter English headword indexed on PlainSpell.

The verdict

“fidelity” has 12 generated spelling variants in the English index at frequency #14,536. The variants make it a useful spelling check.

#14,536
frequency rank, English
2,507
“F” headwords
12
tracked misspellings
1
confusable pair

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Faithfulness to one's moral or civic duties.

Corpus desk

Index EN-fidelity · fidelity · English

fidelity · rank #14,536 · 12 variants · 1 confusable

  • FREQ-MID #14,536
  • LEN-LONG 8 letters
  • VOW-4 4 vowels
  • CONFUS-LOW 1 pairs
  • VAR-MID 12 variants
  • BOOK-MID 2,507
  • PHOTO-FINISH feds

Nearest frequency peer: feds (-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 “fidelity”

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

corpus weight

What this shows “fidelity” 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).

fidelity vs finality
75% similar

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

Key facts for fidelity
PropertyValue
Headwordfidelity
LanguageEnglish
Part of speechNoun
IPA/fɪˈdɛl.ɪ.ti/
Letters8
Frequency rank#14,536
Misspellings tracked12
Confusable pairs1
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “fidelity”

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).fidelitylands here:

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

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “feds” (#14,535), “finely” (#14,537), “fauna” (#14,534). Among 2,507 “F” headwords, “fidelity” is #14,536. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 12 spelling variants around fidelity (IPA /fɪˈdɛl.ɪ.ti/), anoun. Corpus frequency is #14,536 among 2,507 “F” headwords. Wiktionary lists 5 senses, so context still picks the gloss.

Our generated misspelling index lists 12 likely wrong-spelling variants for fidelity, with forms such as "fdielity", "ffidelity", and "fiddelity". 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. It also participates in 1 confusable-pair relationship, "finality", a pairing that trips writers up because the two words share enough sound or shape to blur together.

Etymologically, the entry records: 15th century, from Middle English [Term?], from Middle French fidélité, from Latin fidēlitās, from fidēlis (“faithful”), from fidēs (“faith, loyalty”) (English faith), from Proto-Indo-European *bʰidʰ-, zero-grade of *bʰeydʰ- (“to command, to persuade, to tr… The correct English form is fidelity, spelled F-I-D-E-L-I-T-Y.

Definition

  1. 1
    Faithfulness to one's moral or civic duties.
  2. 2
    Loyalty to one's spouse or partner, including abstention from cheating or extramarital affairs.
  3. 3
    Accuracy, or exact correspondence to some given quality or fact.
  4. 4
    The degree to which a system accurately reproduces an input.
  5. 5
    Faithfulness to God and one's religion.

Recorded use

Wiktionary examples

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

  1. the fidelity of the civil servants
  2. By placing them closer to the source, we can reduce the number of messages in the system and this in turn is likely to improve the fidelity of the system.

Etymology

15th century, from Middle English [Term?], from Middle French fidélité, from Latin fidēlitās, from fidēlis (“faithful”), from fidēs (“faith, loyalty”) (English faith), from Proto-Indo-European *bʰidʰ-, zero-grade of *bʰeydʰ- (“to command, to persuade, to trust”) (English bide). Doublet of fealty.

Antonyms

infidelity

This word in other languages

fidelidad(Español)fidélité(Français)Redlichkeit(Deutsch)fidelidade(Português)

Common misspellings

Also misspelled as:

  • fdielity
  • ffidelity
  • fiddelity
  • fideilty
  • fidelitty
  • fidelityy
  • fideliyt
  • fidellity
  • fideltiy
  • fidleity
  • fiedlity
  • ifdelity

Misspelling Pattern Breakdown

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

fdielity2ffidelity1fiddelity1fideilty2fidelitty1fidelityy1fideliyt2fidellity1
Edit distance from "fidelity"

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 "fidelity"?
"fidelity" is spelled F-I-D-E-L-I-T-Y. The IPA pronunciation is /fɪˈdɛl.ɪ.ti/.
What does "fidelity" mean?
As a noun, "fidelity" means: Faithfulness to one's moral or civic duties.
What words are commonly confused with "fidelity"?
"fidelity" is commonly confused with "finality". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "fidelity"?
The IPA (International Phonetic Alphabet) transcription for "fidelity" is /fɪˈdɛl.ɪ.ti/. 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 "fidelity"?
15th century, from Middle English [Term?], from Middle French fidélité, from Latin fidēlitās, from fidēlis (“faithful”), from fidēs (“faith, loyalty”) (English faith), from Proto-Indo-European *bʰidʰ-, zero-grade of *bʰeydʰ- (“to command, to persu... 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 "fidelity", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 8 letters (nearest by frequency rank).

examiner#14,527eruption#14,526erection#14,525engraved#14,522

Similar misspelling depth

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

doubtful12 variantshardened12 variantshaunting12 variantsinsulted12 variants

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

Source: FrequencyWords open word-frequency list