infinity

/ɪnˈfɪnɪti/

//ɪnˈfɪnɪti// noun

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

"infinity" is a 8-letter English headword indexed on PlainSpell.

The verdict

“infinity” has 12 generated spelling variants in the English index at frequency #9,350. The variants make it a useful spelling check.

#9,350
frequency rank, English
2,140
“I” headwords
12
tracked misspellings
4
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - endlessness, unlimitedness, absence of a beginning, end or limits to size.

Corpus desk

Index EN-infinity · infinity · English

infinity · rank #9,350 · 12 variants · 4 confusables

  • FREQ-COMMON #9,350
  • LEN-LONG 8 letters
  • VOW-4 4 vowels
  • CONFUS-MID 4 pairs
  • VAR-MID 12 variants
  • BOOK-MID 2,140
  • PHOTO-FINISH Indianapolis

Nearest frequency peer: Indianapolis (-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 “infinity”

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

corpus weight

What this shows “infinity” 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).

infinity vs insanity
75% similar
infinity vs infinite
88% similar
infinity vs indignity
78% similar

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

Key facts for infinity
PropertyValue
Headwordinfinity
LanguageEnglish
Part of speechNoun
IPA/ɪnˈfɪnɪti/
Letters8
Frequency rank#9,350
Misspellings tracked12
Confusable pairs4
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “infinity”

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).infinitylands 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 “Indianapolis” (#9,349), “intentionally” (#9,351), “inadequate” (#9,348). Among 2,140 “I” headwords, “infinity” is #9,350. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 12 spelling variants around infinity (IPA /ɪnˈfɪnɪti/), anoun. Corpus frequency is #9,350 among 2,140 “I” headwords. Wiktionary lists 5 senses, so context still picks the gloss.

Our generated misspelling index lists 12 likely wrong-spelling variants for infinity, with forms such as "ifninity", "inffinity", and "infiinty". Each variant is a distinct typo pattern an edit-distance generator flags, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution. It also participates in 4 confusable-pair relationships, "insanity", "infinite", "indignity", and more, where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: From Middle English infinite, from Old French infinité, from Latin īnfīnitās (“unlimitedness”), from negative prefix in- (“not”), + fīnis (“end”), + noun of state suffix -tās. The correct English form is infinity, spelled I-N-F-I-N-I-T-Y.

Definition

  1. 1
    endlessness, unlimitedness, absence of a beginning, end or limits to size.
  2. 2
    A number that has an infinite numerical value that cannot be counted.
  3. 3
    An idealised point which is said to be approached by sequences of values whose magnitudes increase without bound.
  4. 4
    A number which is very large compared to some characteristic number. For example, in optics, an object which is much further away than the focal length of a lens is said to be "at infinity", as the distance of the image from the lens varies very little as the distance increases further.
  5. 5
    The symbol ∞.

Recorded use

Wiktionary examples

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

  1. concept of infinity
  2. The desert stretched out toward the horizon as if into infinity.

Etymology

From Middle English infinite, from Old French infinité, from Latin īnfīnitās (“unlimitedness”), from negative prefix in- (“not”), + fīnis (“end”), + noun of state suffix -tās.

Synonyms

boundlessnessendlessnessinfinitenessinfinitudeinfinitylimitlessnessunendingnessunlimitedness∞

Antonyms

finity

This word in other languages

infinidad(Español)infinité(Français)Unendlichkeit(Deutsch)infinidade(Português)

Common misspellings

Also misspelled as:

  • ifninity
  • inffinity
  • infiinty
  • infinitty
  • infinityy
  • infiniyt
  • infinnity
  • infintiy
  • infniity
  • inifnity
  • innfinity
  • nifinity

Misspelling Pattern Breakdown

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

ifninity2inffinity1infiinty2infinitty1infinityy1infiniyt2infinnity1infintiy2
Edit distance from "infinity"

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 "infinity"?
"infinity" is spelled I-N-F-I-N-I-T-Y. The IPA pronunciation is /ɪnˈfɪnɪti/.
What does "infinity" mean?
As a noun, "infinity" means: endlessness, unlimitedness, absence of a beginning, end or limits to size.
What words are commonly confused with "infinity"?
"infinity" is commonly confused with "insanity", "infinite", "indignity". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "infinity"?
The IPA (International Phonetic Alphabet) transcription for "infinity" is /ɪnˈfɪnɪti/. 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 "infinity"?
From Middle English infinite, from Old French infinité, from Latin īnfīnitās (“unlimitedness”), from negative prefix in- (“not”), + fīnis (“end”), + noun of state suffix -tās. 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 "infinity", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 8 letters (nearest by frequency rank).

marching#9,360globally#9,338membrane#9,362metallic#9,364

Similar misspelling depth

Headwords with a similar count of attested misspellings (12 here; floor ≥5).

murderer12 variantselectron12 variantsnumbered12 variantsofferings12 variants

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

Source: FrequencyWords open word-frequency list