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eighteenth

eigh·teenth/ˌeɪˈtiːnθ/adjective, noun

eighteenth is spelled E-I-G-H-T-E-E-N-T-H, 2 syllables: eigh·teenth. The wrong spelling people search most is eightteenth: about 20 Bing searches a month in the United States (September 2025 to August 2026), about 1 in 15 of all searches for the word. Eighteenth is an adjective meaning “The ordinal form of the number eighteen”.

How many letters and syllables are in eighteenth?

Letters10: E-I-G-H-T-E-E-N-T-H
Syllables2: eigh·teenth
In writing3.0 times per million words; the 15,368th most frequent word form
Wrong spellings searched1; the most searched, eightteenth, about 20 Bing searches a month (all of them)

Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media); Bing searches in the United States: the average month from September 2025 to August 2026 (Microsoft Advertising keyword data through DataForSEO, read September 30, 2026).

How do you spell eighteenth?

Eighteenth is spelled E-I-G-H-T-E-E-N-T-H. One wrong spelling is searched or written often enough to measure; together they are about 1 in 15 of the searches for eighteenth in either form.

eighteenththe right spelling280 searches a month
eightteenthan extra t20 searches a month

Bing searches in the United States: the average month from September 2025 to August 2026 (Microsoft Advertising keyword data through DataForSEO, read September 30, 2026). Wrong spellings are taken from Wiktionary entries tagged "misspelling" and its obsolete or nonstandard forms, Wikipedia's Lists of common misspellings and the codespell dictionary, then measured. The proofreader's marks show the change that corrects each one.

How common is eighteenth?

Eighteenth appears 3.0 times per million words in written English, the 15,368th most frequent word form in the list.

Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).

How do you pronounce eighteenth?

  • /ˌeɪˈtiːnθ/

Eighteenth has 2 syllables, split eigh·teenth in writing.

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: En-us-eighteenth.ogg, Wikimedia Commons (author and licence on each file's page).

Forms of eighteenth

  • eighteenths plural

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

What does eighteenth mean?

The meanings the English Wiktionary records, quoted as written there (source below).

adjective

  1. 1

    The ordinal form of the number eighteen.

noun

  1. 1

    The person or thing in the eighteenth position.

  2. 2

    One of eighteen equal parts of a whole.

  3. 3

    informalA party to celebrate an eighteenth birthday.

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

Eighteenth in Spanish, French, German and Portuguese

LanguageWords
Frenchdix-huitième, dix-huit (the ordinal form of the number eighteen – see…)
Germanachtzehnte (the ordinal form of the number eighteen – see…)
Portuguesedécimo oitavo (the ordinal form of the number eighteen – see…)
Spanishdecimoctavo (the ordinal form of the number eighteen – see…), dieciochoavo (one of eighteen equal parts of a whole)

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.

Where does eighteenth come from?

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

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

What to look up after eighteenth