alertness

/əˈlɝt.nəs/

//əˈlɝt.nəs// noun

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

"alertness" is a 9-letter English headword indexed on PlainSpell.

The verdict

“alertness” has 12 generated spelling variants in the English index at frequency #39,183. The variants make it a useful spelling check.

#39,183
frequency rank, English
3,931
“A” headwords
12
tracked misspellings

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The quality of being alert or on the alert.

Corpus desk

Index EN-alertness · alertness · English

alertness · rank #39,183 · 12 variants · 0 confusables

  • FREQ-MID #39,183
  • LEN-LONG 9 letters
  • VOW-3 3 vowels
  • CONFUS-0 No pairs
  • VAR-MID 12 variants
  • BOOK-MID 3,931
  • PHOTO-FINISH alleyway

Nearest frequency peer: alleyway (+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 “alertness”

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

corpus weight

What this shows “alertness” 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
Key facts for alertness
PropertyValue
Headwordalertness
LanguageEnglish
Part of speechNoun
IPA/əˈlɝt.nəs/
Letters9
Frequency rank#39,183
Misspellings tracked12
Confusable pairs0
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “alertness”

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).alertnesslands 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 “alleyway” (#39,184), “AfD” (#39,181), “amenity” (#39,185). Among 3,931 “A” headwords, “alertness” is #39,183. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 12 spelling variants around alertness (IPA /əˈlɝt.nəs/), anoun. Corpus frequency is #39,183 among 3,931 “A” headwords. Dominant gloss: "The quality of being alert or on the alert.".

Our generated misspelling index lists 12 likely wrong-spelling variants for alertness, with forms such as "aelrtness", "alerntess", and "alerrtness". 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. Our dataset records no confusable match here, since no other headword is close enough in sound or shape to pair with it.

Etymologically, the entry records: From alert + -ness. The correct English form is alertness, spelled A-L-E-R-T-N-E-S-S.

Definition

  1. 1
    The quality of being alert or on the alert.

Recorded use

Wiktionary example

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

  1. THE human body was meant to have a midafternoon nap, according to a new consensus among sleep researchers who are studying the biological rhythms of sleep and alertness.

Etymology

From alert + -ness.

This word in other languages

vigilancia(Español)

Common misspellings

Also misspelled as:

  • aelrtness
  • alerntess
  • alerrtness
  • alertenss
  • alertnes
  • alertnness
  • alertnses
  • alerttness
  • aletrness
  • allertness
  • alretness
  • laertness

Misspelling Pattern Breakdown

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

aelrtness2alerntess2alerrtness1alertenss2alertnes1alertnness1alertnses2alerttness1
Edit distance from "alertness"

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 "alertness"?
"alertness" is spelled A-L-E-R-T-N-E-S-S. The IPA pronunciation is /əˈlɝt.nəs/.
What does "alertness" mean?
As a noun, "alertness" means: The quality of being alert or on the alert.
What are common misspellings of "alertness"?
Common misspellings include "aelrtness", "alerntess", "alerrtness", "alertenss", "alertnes". The correct spelling is "alertness".
How do you pronounce "alertness"?
The IPA (International Phonetic Alphabet) transcription for "alertness" is /əˈlɝt.nəs/. 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 "alertness"?
From alert + -ness. 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 "alertness", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 9 letters (nearest by frequency rank).

whosoever#39,163barbarism#39,204Volgograd#39,158voiceless#39,156

Similar misspelling depth

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

attenuated12 variantsbareback12 variantsVeracruz12 variantsbrainless12 variants

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

Source: FrequencyWords open word-frequency list