fortnight

/ˈfɔːt.naɪt/

//ˈfɔːt.naɪt// noun

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

"fortnight" is a 9-letter English headword indexed on PlainSpell.

The verdict

“fortnight” has 15 generated spelling variants in the English index at frequency #16,920. The variants make it a useful spelling check.

#16,920
frequency rank, English
2,507
“F” headwords
15
tracked misspellings
4
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A period of 2 weeks.

Corpus desk

Index EN-fortnight · fortnight · English

fortnight · rank #16,920 · 15 variants · 4 confusables

  • FREQ-MID #16,920
  • LEN-LONG 9 letters
  • VOW-2 2 vowels
  • CONFUS-MID 4 pairs
  • VAR-HIGH 15 variants
  • BOOK-MID 2,507
  • PHOTO-FINISH Fresno

Nearest frequency peer: Fresno (+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 “fortnight”

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

corpus weight

What this shows “fortnight” 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).

fortnight vs fortnightly
82% similar
fortnight vs fortnite
67% similar
fortnight vs foresight
78% similar

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

Key facts for fortnight
PropertyValue
Headwordfortnight
LanguageEnglish
Part of speechNoun
IPA/ˈfɔːt.naɪt/
Letters9
Frequency rank#16,920
Misspellings tracked15
Confusable pairs4
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “fortnight”

This scale runs from the tiny cluster of words that carry ordinary speech (left) to the long tail of words almost nobody reaches for (right).fortnightlands here:

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

The axis is logarithmic, with each marked tick roughly ten times rarer than the last. Same rarity band neighbours include “Fresno” (#16,921), “foreclosure” (#16,918), “FS” (#16,922). Among 2,507 “F” headwords, “fortnight” is #16,920. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 15 spelling variants around fortnight (IPA /ˈfɔːt.naɪt/), anoun. Corpus frequency is #16,920 among 2,507 “F” headwords. Dominant gloss: "A period of 2 weeks.".

Our generated misspelling index lists 15 likely wrong-spelling variants for fortnight, with forms such as "ffortnight", "forntight", and "forrtnight". Each of these forms differs from the correct spelling by one small edit: a doubled letter, a dropped silent letter, or a substituted vowel. It also participates in 4 confusable-pair relationships, "fortnightly", "fortnite", "foresight", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.

Etymologically, the entry records: From Middle English fourtenyght, fourtene nyght, from Old English fēowertīene niht (literally “fourteen nights"; the Anglo-Saxons counted by nights), equivalent to fourteen + night. Compare sennight. The correct English form is fortnight, spelled F-O-R-T-N-I-G-H-T.

Definition

  1. 1
    A period of 2 weeks.

Recorded use

Wiktionary examples

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

  1. Holonyms: month < year < gigasecond < century < kiloannum, kiloyear, millennium < terasecond < mega-annum, megayear < petasecond < giga-annum, gigayear < exasecond < zettasecond < yottasecond < ronnasecond < quettasecond
  2. Meronyms: quectosecond < rontosecond < yoctosecond < zeptosecond < attosecond < femtosecond < picosecond < nanosecond < microsecond < millisecond < centisecond < decisecond < second < decasecond < minute < hectosecond < kilosecond < hour < day < week < megasecond

Etymology

From Middle English fourtenyght, fourtene nyght, from Old English fēowertīene niht (literally “fourteen nights"; the Anglo-Saxons counted by nights), equivalent to fourteen + night. Compare sennight.

This word in other languages

quincena(Español)quinze jours(Français)quinzena(Português)

Common misspellings

Also misspelled as:

  • ffortnight
  • forntight
  • forrtnight
  • fortinght
  • fortngiht
  • fortnigght
  • fortnighht
  • fortnightt
  • fortnigth
  • fortnihgt
  • fortnnight
  • forttnight
  • fotrnight
  • frotnight
  • ofrtnight

Misspelling Pattern Breakdown

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

ffortnight1forntight2forrtnight1fortinght2fortngiht2fortnigght1fortnighht1fortnightt1
Edit distance from "fortnight"

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 "fortnight"?
"fortnight" is spelled F-O-R-T-N-I-G-H-T. The IPA pronunciation is /ˈfɔːt.naɪt/.
What does "fortnight" mean?
As a noun, "fortnight" means: A period of 2 weeks.
What words are commonly confused with "fortnight"?
"fortnight" is commonly confused with "fortnightly", "fortnite", "foresight". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "fortnight"?
The IPA (International Phonetic Alphabet) transcription for "fortnight" is /ˈfɔːt.naɪt/. 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 "fortnight"?
From Middle English fourtenyght, fourtene nyght, from Old English fēowertīene niht (literally “fourteen nights"; the Anglo-Saxons counted by nights), equivalent to fourteen + night. Compare sennight. 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 "fortnight", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 9 letters (nearest by frequency rank).

expulsion#16,910evergreen#16,905embarrass#16,898madeleine#16,962

Similar misspelling depth

Headwords with a similar count of attested misspellings (15 here; floor ≥5).

immortality15 variantscommonplace15 variantsordination15 variantstriangular15 variants

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

Source: FrequencyWords open word-frequency list