insomnia

/ɪnˈsɒmniə/

//ɪnˈsɒmniə// noun

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

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

The verdict

“insomnia” has 11 generated spelling variants in the English index at frequency #16,501. The variants make it a useful spelling check.

#16,501
frequency rank, English
2,140
“I” headwords
11
tracked misspellings
2
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A sleeping disorder that is known for its symptoms of unrest and the inability to sleep.

Corpus desk

Index EN-insomnia · insomnia · English

insomnia · rank #16,501 · 11 variants · 2 confusables

  • FREQ-MID #16,501
  • LEN-LONG 8 letters
  • VOW-4 4 vowels
  • CONFUS-LOW 2 pairs
  • VAR-MID 11 variants
  • BOOK-MID 2,140
  • PHOTO-FINISH incompetence

Nearest frequency peer: incompetence (-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 “insomnia”

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

corpus weight

What this shows “insomnia” 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).

insomnia vs insomniac
89% similar
insomnia vs insignia
75% similar

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

Key facts for insomnia
PropertyValue
Headwordinsomnia
LanguageEnglish
Part of speechNoun
IPA/ɪnˈsɒmniə/
Letters8
Frequency rank#16,501
Misspellings tracked11
Confusable pairs2
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “insomnia”

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right).insomnialands 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 “incompetence” (#16,500), “interception” (#16,502), “invaders” (#16,503). Among 2,140 “I” headwords, “insomnia” is #16,501. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 11 spelling variants around insomnia (IPA /ɪnˈsɒmniə/), anoun. Corpus frequency is #16,501 among 2,140 “I” headwords. Wiktionary lists 2 senses, so context still picks the gloss.

Our generated misspelling index lists 11 likely wrong-spelling variants for insomnia, with forms such as "innsomnia", "inosmnia", and "insmonia". 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, "insomniac", "insignia", since the words sound or look close enough that writers reach for the wrong one mid-sentence.

Etymologically, the entry records: Borrowed from Latin īnsomnia, from Latin in- (“without”) + somnus (“sleep”, noun) + -ia, equivalent to in- + somn- + -ia. The correct English form is insomnia, spelled I-N-S-O-M-N-I-A.

Definition

  1. 1
    A sleeping disorder that is known for its symptoms of unrest and the inability to sleep.
  2. 2
    Temporary inability to sleep.

Recorded use

Wiktionary examples

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

  1. My mother suffers from insomnia.
  2. It’s also possible for insomnia to be caused by restless leg syndrome.

Etymology

Borrowed from Latin īnsomnia, from Latin in- (“without”) + somnus (“sleep”, noun) + -ia, equivalent to in- + somn- + -ia.

Synonyms

sleeplessness

Antonyms

hypersomnia

This word in other languages

insomnio(Español)insomnie(Français)Schlaflosigkeit(Deutsch)insônia(Português)

Common misspellings

Also misspelled as:

  • innsomnia
  • inosmnia
  • insmonia
  • insomina
  • insommnia
  • insomnai
  • insomnnia
  • insonmia
  • inssomnia
  • isnomnia
  • nisomnia

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of insomnia - 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.

innsomnia1inosmnia2insmonia2insomina2insommnia1insomnai2insomnnia1insonmia2
Edit distance from "insomnia"

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 "insomnia"?
"insomnia" is spelled I-N-S-O-M-N-I-A. The IPA pronunciation is /ɪnˈsɒmniə/.
What does "insomnia" mean?
As a noun, "insomnia" means: A sleeping disorder that is known for its symptoms of unrest and the inability to sleep.
What words are commonly confused with "insomnia"?
"insomnia" is commonly confused with "insomniac", "insignia". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "insomnia"?
The IPA (International Phonetic Alphabet) transcription for "insomnia" is /ɪnˈsɒmniə/. 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 "insomnia"?
Borrowed from Latin īnsomnia, from Latin in- (“without”) + somnus (“sleep”, noun) + -ia, equivalent to in- + somn- + -ia. 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 "insomnia", not the corpus desk frequency band.

Same letter count

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

invaders#16,503Israelis#16,505hammered#16,483Garfield#16,477

Similar misspelling depth

Headwords with a similar count of attested misspellings (11 here; floor ≥5).

horrified11 variantslyrical11 variantsManitoba11 variantsFrançois11 variants

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

Source: FrequencyWords open word-frequency list