async
"async" is a 5-letter English headword indexed on PlainSpell.
The verdict
“async” is uncommon English (frequency #70,466 among 3,931 “A” headwords), classed as an adjective. The kind of spelling people second-guess.
- #70,466
- frequency rank, English
- 3,931
- “A” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Abbreviation of asynchronous.
Corpus desk
Index EN-async · async · English
async · rank #70,466 · 0 variants · 0 confusables
- FREQ-RARE #70,466
- LEN-MID 5 letters
- VOW-2 2 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 3,931
- PHOTO-FINISH ascribes
Nearest frequency peer: ascribes (-2 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.
Long-tail ranks near “async”
Sparse band: bars invert rank so rarer forms read shorter
- arbour
arbour
29,539 corpus weight
- ardour
ardour
29,538 corpus weight
- ascribes
ascribes
29,537 corpus weight
- async
async
29,535 corpus weight
- authoritati…
authoritatively
29,531 corpus weight
- aven
aven
29,530 corpus weight
What this shows Long-tail view: where “async” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | async |
| Language | English |
| Part of speech | Adjective |
| Letters | 5 |
| Frequency rank | #70,466 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “async” in English
Rare enough to double-check
async is uncommon English at frequency #70,466 among 3,931 “A” headwords, classed as anadjective. Rarity is why readers land here mid-draft. Gloss: "Abbreviation of asynchronous.".
No misspelling variants are generated for async in our index, which points to an orthography that plays by predictable English rules. Our dataset records no confusable match here, suggesting its spelling stands apart enough that readers rarely confuse it with something else.
This entry carries no recorded etymology, leaving phoneme-to-grapheme mapping as the best guide to its spelling rather than a borrowing history. The correct English form is async, spelled A-S-Y-N-C.
Definition
- 1Abbreviation of asynchronous.
Recorded use
Wiktionary exampleThese source excerpts show how async appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
The tradeoff is that the first time an async event causes a scheduling point, it incurs the thread creation overhead that it has avoided.
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.
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "async", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 5 letters (nearest by frequency rank).