synchronous

/ˈsɪŋkɹənəs/

//ˈsɪŋkɹənəs// adj

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

"synchronous" is a 11-letter English headword indexed on PlainSpell.

The verdict

“synchronous” has 18 generated spelling variants in the English index at frequency #29,115. The variants make it a useful spelling check.

#29,115
frequency rank, English
6,566
“S” headwords
18
tracked misspellings

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - At the same time, at the same frequency.

Corpus desk

Index EN-synchronous · synchronous · English

synchronous · rank #29,115 · 18 variants · 0 confusables

  • FREQ-MID #29,115
  • LEN-MEGA 11 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-HIGH 18 variants
  • BOOK-DENSE 6,566
  • PHOTO-FINISH SXSW

Nearest frequency peer: SXSW (-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 “synchronous”

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

corpus weight

What this shows “synchronous” 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 synchronous
PropertyValue
Headwordsynchronous
LanguageEnglish
Part of speechAdjective
IPA/ˈsɪŋkɹənəs/
Letters11
Frequency rank#29,115
Misspellings tracked18
Confusable pairs0
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “synchronous”

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).synchronouslands 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 “SXSW” (#29,114), “T4” (#29,116), “Tania” (#29,117). Among 6,566 “S” headwords, “synchronous” is #29,115. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 18 spelling variants around synchronous (IPA /ˈsɪŋkɹənəs/), anadjective. Corpus frequency is #29,115 among 6,566 “S” headwords. Wiktionary lists 2 senses, so context still picks the gloss.

Our generated misspelling index lists 18 likely wrong-spelling variants for synchronous, with forms such as "snychronous", "ssynchronous", and "sycnhronous". 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. We don't track a confusable pairing for this entry, which typically means the spelling is too distinctive to be mistaken for another word.

Etymologically, the entry records: Borrowed from Late Latin synchronus, from Ancient Greek σύγχρονος (súnkhronos, “contemporaneous”), from σῠν- (sŭn-, “with, together”) + χρόνος (khrónos, “time”). By surface analysis, syn- + chron- + -ous = synchrony + -ous; however, all related words (e.g.,… The correct English form is synchronous, spelled S-Y-N-C-H-R-O-N-O-U-S.

Definition

  1. 1
    At the same time, at the same frequency.
  2. 2
    Single-threaded; blocking; occurring in the same thread as other computations, thereby preventing those computations from resuming until the communication is complete.

Recorded use

Wiktionary example

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

  1. Post is a “fire and forget” where the UI thread work is performed asynchronously; Send is synchronous in that the call blocks until the UI thread work has been performed.

Etymology

Borrowed from Late Latin synchronus, from Ancient Greek σύγχρονος (súnkhronos, “contemporaneous”), from σῠν- (sŭn-, “with, together”) + χρόνος (khrónos, “time”). By surface analysis, syn- + chron- + -ous = synchrony + -ous; however, all related words (e.g., synchronic, synchrony, synchronicity, diachronous, diachronic, diachrony, diachronicity) were coined later, either as back-formations from, or otherwise by analogy with the surface analysis of, synchronous.

This word in other languages

síncrono(Español)synchrone(Français)synchron(Deutsch)

Common misspellings

Also misspelled as:

  • snychronous
  • ssynchronous
  • sycnhronous
  • syncchronous
  • synchhronous
  • synchornous
  • synchrnoous
  • synchronnous
  • synchronosu
  • synchronouss
  • synchronuos
  • synchroonus
  • synchrronous
  • syncrhonous
  • synhcronous
  • synnchronous
  • syynchronous
  • ysnchronous

Misspelling Pattern Breakdown

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

snychronous2ssynchronous1sycnhronous2syncchronous1synchhronous1synchornous2synchrnoous2synchronnous1
Edit distance from "synchronous"

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 "synchronous"?
"synchronous" is spelled S-Y-N-C-H-R-O-N-O-U-S. The IPA pronunciation is /ˈsɪŋkɹənəs/.
What does "synchronous" mean?
As an adjective, "synchronous" means: At the same time, at the same frequency.
What are common misspellings of "synchronous"?
Common misspellings include "snychronous", "ssynchronous", "sycnhronous", "syncchronous", "synchhronous". The correct spelling is "synchronous".
How do you pronounce "synchronous"?
The IPA (International Phonetic Alphabet) transcription for "synchronous" is /ˈsɪŋkɹənəs/. 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 "synchronous"?
Borrowed from Late Latin synchronus, from Ancient Greek σύγχρονος (súnkhronos, “contemporaneous”), from σῠν- (sŭn-, “with, together”) + χρόνος (khrónos, “time”). By surface analysis, syn- + chron- + -ous = synchrony + -ous; however, all related wo... 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 "synchronous", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 11 letters (nearest by frequency rank).

superfluous#29,109signatories#29,085predictably#29,047blacklisted#29,190

Similar misspelling depth

Headwords with a similar count of attested misspellings (18 here; floor ≥5).

undiscovered18 variantsdisorganized18 variantsconsignment18 variantsmotorsports18 variants

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

Source: FrequencyWords open word-frequency list