eighteenth

/ˌeɪˈtiːnθ/

//ˌeɪˈtiːnθ// adj

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

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

The verdict

“eighteenth” has 15 generated spelling variants in the English index at frequency #15,392. The variants make it a useful spelling check.

#15,392
frequency rank, English
2,246
“E” headwords
15
tracked misspellings
1
confusable pair

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The ordinal form of the number eighteen.

Corpus desk

Index EN-eighteenth · eighteenth · English

eighteenth · rank #15,392 · 15 variants · 1 confusable

  • FREQ-MID #15,392
  • LEN-MEGA 10 letters
  • VOW-4 4 vowels
  • CONFUS-LOW 1 pairs
  • VAR-HIGH 15 variants
  • BOOK-MID 2,246
  • PHOTO-FINISH ecstasy

Nearest frequency peer: ecstasy (-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 “eighteenth”

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

corpus weight

What this shows “eighteenth” 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).

eighteenth vs eighteen
80% similar

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

Key facts for eighteenth
PropertyValue
Headwordeighteenth
LanguageEnglish
Part of speechAdjective
IPA/ˌeɪˈtiːnθ/
Letters10
Frequency rank#15,392
Misspellings tracked15
Confusable pairs1
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “eighteenth”

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right).eighteenthlands here:

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

Ticks step logarithmically, so each one marks a roughly tenfold drop in how often the word turns up. Same rarity band neighbours include “ecstasy” (#15,391), “eleventh” (#15,393), “dripping” (#15,390). Among 2,246 “E” headwords, “eighteenth” is #15,392. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 15 spelling variants around eighteenth (IPA /ˌeɪˈtiːnθ/), anadjective. Corpus frequency is #15,392 among 2,246 “E” headwords. Dominant gloss: "The ordinal form of the number eighteen.".

Our generated misspelling index lists 15 likely wrong-spelling variants for eighteenth, with forms such as "egihteenth", "eigghteenth", and "eighetenth". Every one of these variants traces to a single-character edit -- an added or dropped letter, a swapped consonant, or a vowel swap -- the kind of slip a spell-checker is built to catch. It also participates in 1 confusable-pair relationship, "eighteen", where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: Inherited from Middle English eightetenthe, eightetethe, from Old English eahtatēoþa, from Proto-Germanic *ahtudô tehundô. Equivalent to eighteen + -th (ordinal suffix). The correct English form is eighteenth, spelled E-I-G-H-T-E-E-N-T-H.

Definition

  1. 1
    The ordinal form of the number eighteen.

Etymology

Inherited from Middle English eightetenthe, eightetethe, from Old English eahtatēoþa, from Proto-Germanic *ahtudô tehundô. Equivalent to eighteen + -th (ordinal suffix).

Synonyms

18thXVIIIthXVIII

This word in other languages

decimoctavo(Español)dix-huitième(Français)achtzehnte(Deutsch)

Common misspellings

Also misspelled as:

  • egihteenth
  • eigghteenth
  • eighetenth
  • eighhteenth
  • eighteenht
  • eighteennth
  • eighteenthh
  • eighteentth
  • eighteetnh
  • eighteneth
  • eightenth
  • eightteenth
  • eigtheenth
  • eihgteenth
  • ieghteenth

Misspelling Pattern Breakdown

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

egihteenth2eigghteenth1eighetenth2eighhteenth1eighteenht2eighteennth1eighteenthh1eighteentth1
Edit distance from "eighteenth"

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 "eighteenth"?
"eighteenth" is spelled E-I-G-H-T-E-E-N-T-H. The IPA pronunciation is /ˌeɪˈtiːnθ/.
What does "eighteenth" mean?
As an adjective, "eighteenth" means: The ordinal form of the number eighteen.
What words are commonly confused with "eighteenth"?
"eighteenth" is commonly confused with "eighteen". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "eighteenth"?
The IPA (International Phonetic Alphabet) transcription for "eighteenth" is /ˌeɪˈtiːnθ/. 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 "eighteenth"?
Inherited from Middle English eightetenthe, eightetethe, from Old English eahtatēoþa, from Proto-Germanic *ahtudô tehundô. Equivalent to eighteen + -th (ordinal suffix). 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 "eighteenth", not the corpus desk frequency band.

Same letter count

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

empowering#15,396Disneyland#15,386expiration#15,401crossroads#15,380

Similar misspelling depth

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

chromosome15 variantsinstituted15 variantsBlackburn15 variantsvolatility15 variants

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

Source: FrequencyWords open word-frequency list