millennium

/mɪˈlɛnɪəm/

//mɪˈlɛnɪəm// noun

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

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

The verdict

“millennium” has 10 generated spelling variants in the English index at frequency #11,249. The variants make it a useful spelling check.

#11,249
frequency rank, English
4,057
“M” headwords
10
tracked misspellings
3
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A period of time consisting of one thousand years.

Corpus desk

Index EN-millennium · millennium · English

millennium · rank #11,249 · 10 variants · 3 confusables

  • FREQ-MID #11,249
  • LEN-MEGA 10 letters
  • VOW-4 4 vowels
  • CONFUS-LOW 3 pairs
  • VAR-MID 10 variants
  • BOOK-MID 4,057
  • PHOTO-FINISH meaningless

Nearest frequency peer: meaningless (-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 “millennium”

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

corpus weight

What this shows “millennium” 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).

millennium vs millennia
80% similar
millennium vs millenium
90% similar
millennium vs millennial
80% similar

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

Key facts for millennium
PropertyValue
Headwordmillennium
LanguageEnglish
Part of speechNoun
IPA/mɪˈlɛnɪəm/
Letters10
Frequency rank#11,249
Misspellings tracked10
Confusable pairs3
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “millennium”

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).millenniumlands 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 “meaningless” (#11,248), “misunderstanding” (#11,250), “manually” (#11,247). Among 4,057 “M” headwords, “millennium” is #11,249. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 10 spelling variants around millennium (IPA /mɪˈlɛnɪəm/), anoun. Corpus frequency is #11,249 among 4,057 “M” headwords. Wiktionary lists 3 senses, so context still picks the gloss.

Our generated misspelling index lists 10 likely wrong-spelling variants for millennium, with forms such as "imllennium", "milelnnium", and "milennium". 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 3 confusable-pair relationships, "millennia", "millenium", "millennial", a pairing that trips writers up because the two words share enough sound or shape to blur together.

Etymologically, the entry records: From Late Latin mīllennium, from Latin mīllennis (“1000-year”) + -ium (forming abstract nouns). The correct English form is millennium, spelled M-I-L-L-E-N-N-I-U-M.

Definition

  1. 1
    A period of time consisting of one thousand years.
  2. 2
    The year in which one period of one thousand years ends and another begins, especially the year 2000.
  3. 3
    Any long (and possibly endless) era of universal happiness, peace, and prosperity, predicted by various people to come about someday.

Recorded use

Wiktionary examples

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

  1. But these seekers, too, are saved - by virtue of the inherited symbolic aids of society, the rites of passage, the grace-yielding sacraments, given to mankind of old by the redeemers and handed down through millenniums.
  2. How this happens no one really knows, despite the efforts of philosophers and psychologists over two and a half millennia to study the phenomenon.

Etymology

From Late Latin mīllennium, from Latin mīllennis (“1000-year”) + -ium (forming abstract nouns).

This word in other languages

milenio(Español)millénaire(Français)Jahrtausend(Deutsch)milénio(Português)

Common misspellings

Also misspelled as:

  • imllennium
  • milelnnium
  • milennium
  • milleninum
  • millennimu
  • millenniumm
  • millennuim
  • millnenium
  • mlilennium
  • mmillennium

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of millennium - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.

imllennium2milelnnium2milennium1milleninum2millennimu2millenniumm1millennuim2millnenium2
Edit distance from "millennium"

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 "millennium"?
"millennium" is spelled M-I-L-L-E-N-N-I-U-M. The IPA pronunciation is /mɪˈlɛnɪəm/.
What does "millennium" mean?
As a noun, "millennium" means: A period of time consisting of one thousand years.
What words are commonly confused with "millennium"?
"millennium" is commonly confused with "millennia", "millenium", "millennial". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "millennium"?
The IPA (International Phonetic Alphabet) transcription for "millennium" is /mɪˈlɛnɪəm/. 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 "millennium"?
From Late Latin mīllennium, from Latin mīllennis (“1000-year”) + -ium (forming abstract nouns). 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 "millennium", not the corpus desk frequency band.

Same letter count

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

Kardashian#11,242indictment#11,236Petersburg#11,265responsive#11,280

Similar misspelling depth

Headwords with a similar count of attested misspellings (10 here; floor ≥5).

manually10 variantsmodules10 variantsleaking10 variantsnoodles10 variants

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

Source: FrequencyWords open word-frequency list