insanity

/ɪnˈsænɪti/

//ɪnˈsænɪti// noun

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

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

The verdict

“insanity” has 12 generated spelling variants in the English index at frequency #10,870. The variants make it a useful spelling check.

#10,870
frequency rank, English
2,140
“I” headwords
12
tracked misspellings
2
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The state of being insane; madness.

Corpus desk

Index EN-insanity · insanity · English

insanity · rank #10,870 · 12 variants · 2 confusables

  • FREQ-MID #10,870
  • LEN-LONG 8 letters
  • VOW-4 4 vowels
  • CONFUS-LOW 2 pairs
  • VAR-MID 12 variants
  • BOOK-MID 2,140
  • PHOTO-FINISH inflammatory

Nearest frequency peer: inflammatory (-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 “insanity”

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

corpus weight

What this shows “insanity” 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).

insanity vs infinity
75% similar
insanity vs insanely
75% similar

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

Key facts for insanity
PropertyValue
Headwordinsanity
LanguageEnglish
Part of speechNoun
IPA/ɪnˈsænɪti/
Letters8
Frequency rank#10,870
Misspellings tracked12
Confusable pairs2
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “insanity”

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).insanitylands 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 “inflammatory” (#10,869), “insecure” (#10,871), “Indies” (#10,868). Among 2,140 “I” headwords, “insanity” is #10,870. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 12 spelling variants around insanity (IPA /ɪnˈsænɪti/), anoun. Corpus frequency is #10,870 among 2,140 “I” headwords. Dominant gloss: "The state of being insane; madness.".

Our generated misspelling index lists 12 likely wrong-spelling variants for insanity, with forms such as "inasnity", "innsanity", and "insainty". 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 2 confusable-pair relationships, "infinity", "insanely", where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: A three-part word (root 'sane', prefix 'in-' meaning 'not', suffix '-ity', meaning 'the state of'). Derived from Latin precursory equivalents. Two possible candidates for construction order: * insane + -ity: īnsānus (“unhealthy; insane”) + -itās *: Latin īn… The correct English form is insanity, spelled I-N-S-A-N-I-T-Y.

Definition

  1. 1
    The state of being insane; madness.

Recorded use

Wiktionary examples

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

  1. The defendant pleaded insanity in the hope of getting a reduced sentence.
  2. But the bed-side of Lady Marchmont had a darker lesson than the grave, the ravings of insanity revealed the fiery world of that beating and passionate heart. Ethel could only feel too fearful, too humbled, for judgment; but she wept, even while she prayed, beside her early friend.

Etymology

A three-part word (root 'sane', prefix 'in-' meaning 'not', suffix '-ity', meaning 'the state of'). Derived from Latin precursory equivalents. Two possible candidates for construction order: * insane + -ity: īnsānus (“unhealthy; insane”) + -itās *: Latin īnsānus (“unsound in mind; mad, insane”), from in- + sānus (“sound, sane”). Modern forms of roots: in- + sane * in- + sanity: in- (“lacking; without”) + sānitās (“health; sanity”) *: Latin sānitās (“sound in mind; sane”), from sānus + -itās. Modern forms of roots: sane + -ity

Synonyms

bedlamismbrainsicknesscrazecrazinessderangementinsanenessinsanitylunacylunemadnessmental disordermental illnessunreasonunsanity

Antonyms

mental healthsanenesssanity

This word in other languages

locura(Español)folie(Français)Wahnsinn(Deutsch)insanidade(Português)

Common misspellings

Also misspelled as:

  • inasnity
  • innsanity
  • insainty
  • insanitty
  • insanityy
  • insaniyt
  • insannity
  • insantiy
  • insnaity
  • inssanity
  • isnanity
  • nisanity

Misspelling Pattern Breakdown

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

inasnity2innsanity1insainty2insanitty1insanityy1insaniyt2insannity1insantiy2
Edit distance from "insanity"

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 "insanity"?
"insanity" is spelled I-N-S-A-N-I-T-Y. The IPA pronunciation is /ɪnˈsænɪti/.
What does "insanity" mean?
As a noun, "insanity" means: The state of being insane; madness.
What words are commonly confused with "insanity"?
"insanity" is commonly confused with "infinity", "insanely". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "insanity"?
The IPA (International Phonetic Alphabet) transcription for "insanity" is /ɪnˈsænɪti/. 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 "insanity"?
A three-part word (root 'sane', prefix 'in-' meaning 'not', suffix '-ity', meaning 'the state of'). Derived from Latin precursory equivalents. Two possible candidates for construction order: * insane + -ity: īnsānus (“unhealthy; insane”) + -itās *... 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 "insanity", not the corpus desk frequency band.

Same letter count

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

insecure#10,871Lebanese#10,880lecturer#10,881generals#10,850

Similar misspelling depth

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

miniature12 variantsfeasible12 variantsensemble12 variantsobstacle12 variants

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

Source: FrequencyWords open word-frequency list