asynchronous

/eɪˈsɪŋkɹənəs/

//eɪˈsɪŋkɹənəs// adj

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

"asynchronous" is a 12-letter English headword indexed on PlainSpell.

The verdict

“asynchronous” has 19 generated spelling variants in the English index at frequency #33,521. The variants make it a useful spelling check.

#33,521
frequency rank, English
3,931
“A” headwords
19
tracked misspellings

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Not synchronous; occurring at different times.

Corpus desk

Index EN-asynchronous · asynchronous · English

asynchronous · rank #33,521 · 19 variants · 0 confusables

  • FREQ-MID #33,521
  • LEN-MEGA 12 letters
  • VOW-5 5 vowels
  • CONFUS-0 No pairs
  • VAR-HIGH 19 variants
  • BOOK-MID 3,931
  • PHOTO-FINISH asymmetry

Nearest frequency peer: asymmetry (-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 “asynchronous”

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

corpus weight

What this shows “asynchronous” 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 asynchronous
PropertyValue
Headwordasynchronous
LanguageEnglish
Part of speechAdjective
IPA/eɪˈsɪŋkɹənəs/
Letters12
Frequency rank#33,521
Misspellings tracked19
Confusable pairs0
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “asynchronous”

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).asynchronouslands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “asymmetry” (#33,520), “assessor” (#33,519), “attuned” (#33,523). Among 3,931 “A” headwords, “asynchronous” is #33,521. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 19 spelling variants around asynchronous (IPA /eɪˈsɪŋkɹənəs/), anadjective. Corpus frequency is #33,521 among 3,931 “A” headwords. Wiktionary lists 3 senses, so context still picks the gloss.

Our generated misspelling index lists 19 likely wrong-spelling variants for asynchronous, with forms such as "asnychronous", "assynchronous", and "asycnhronous". 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 is not paired with a close-neighbour confusable in our dataset, which tends to mean the word is visually distinctive enough to stand on its own.

Etymologically, the entry records: From a- + synchronous. The correct English form is asynchronous, spelled A-S-Y-N-C-H-R-O-N-O-U-S.

Definition

  1. 1
    Not synchronous; occurring at different times.
  2. 2
    Allowing the client to continue during processing.
  3. 3
    Having many actions occurring at a time, in any order, without waiting for each other.

Recorded use

Wiktionary examples

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

  1. These cyberforums are asynchronous; that is, contributors post (i.e., publish a text message) without the need for fellow communicants to be online at the same time.
  2. Near-synonym: in parallel

Etymology

From a- + synchronous.

Synonyms

asyncasynchmetachronous

Antonyms

synchronous

This word in other languages

asynchrone(Français)assíncrono(Português)

Common misspellings

Also misspelled as:

  • asnychronous
  • assynchronous
  • asycnhronous
  • asyncchronous
  • asynchhronous
  • asynchornous
  • asynchrnoous
  • asynchronnous
  • asynchronosu
  • asynchronouss
  • asynchronuos
  • asynchroonus
  • asynchrronous
  • asyncrhonous
  • asynhcronous
  • asynnchronous
  • asyynchronous
  • aysnchronous
  • saynchronous

Misspelling Pattern Breakdown

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

asnychronous2assynchronous1asycnhronous2asyncchronous1asynchhronous1asynchornous2asynchrnoous2asynchronnous1
Edit distance from "asynchronous"

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 "asynchronous"?
"asynchronous" is spelled A-S-Y-N-C-H-R-O-N-O-U-S. The IPA pronunciation is /eɪˈsɪŋkɹənəs/.
What does "asynchronous" mean?
As an adjective, "asynchronous" means: Not synchronous; occurring at different times.
What are common misspellings of "asynchronous"?
Common misspellings include "asnychronous", "assynchronous", "asycnhronous", "asyncchronous", "asynchhronous". The correct spelling is "asynchronous".
How do you pronounce "asynchronous"?
The IPA (International Phonetic Alphabet) transcription for "asynchronous" is /eɪˈsɪŋkɹənəs/. 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 "asynchronous"?
From a- + synchronous. 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 "asynchronous", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 12 letters (nearest by frequency rank).

afterthought#33,501Westmoreland#33,484undetermined#33,470consecration#33,588

Similar misspelling depth

Headwords with a similar count of attested misspellings (19 here; floor ≥5).

spectrometer19 variantsentanglement19 variantsexpeditionary19 variantsindeterminate19 variants

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

Source: FrequencyWords open word-frequency list