eighteenth
/ˌeɪˈtiːnθ/
"eighteenth" is a 10-letter English headword indexed on PlainSpell.
The verdict
“eighteenth” is a moderately-common English word, ranked #15,392 in English word frequency and used as an adjective.
- #15,392
- frequency rank, English
- 10
- letters
- 15
- tracked misspellings
- 1
- confusable pair
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - The ordinal form of the number eighteen.
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | eighteenth |
| Language | English |
| Part of speech | Adjective |
| IPA | /ˌeɪˈtiːnθ/ |
| Letters | 10 |
| Frequency rank | #15,392 |
| Misspellings tracked | 15 |
| Confusable pairs | 1 |
| Source | Wiktionary (kaikki.org) |
Where “eighteenth” sits in English frequency
Spelling & Dictionary Insight
The English entry for eighteenth is 10 letters long, classified as an adjective, and transcribed in the International Phonetic Alphabet as /ˌeɪˈtiːnθ/. Corpus data places it at rank #15,392 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. The dominant gloss from Wiktionary reads: "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
- 1The 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
This word in other languages
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.
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
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Using “eighteenth”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is E-I-G-H-T-E-E-N-T-H - every other letter order is a misspelling in standard orthography.
- Say it as /ˌeɪˈtiːnθ/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “eighteen” - see the side-by-side comparison. eighteenth vs eighteen
- Browse more English words and confusable pairs in the same reference. English words
Data Source
Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.