ACS
"acs" is a 3-letter English headword indexed on PlainSpell.
The verdict
“ACS” sits in 20 confusable pairs (corpus #24,368) as a proper noun. The look-alike neighbours are the real trap.
- #24,368
- frequency rank, English
- 3,931
- “A” headwords
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Initialism of Australian Computer Society.
Corpus desk
Index EN-acs · ACS · English
ACS · rank #24,368 · 0 variants · 20 confusables
- FREQ-MID #24,368
- LEN-MID 3 letters
- VOW-1 1 vowel
- CONFUS-HIGH 20 pairs
- VAR-0 0 variants
- BOOK-MID 3,931
- PHOTO-FINISH acer
Nearest frequency peer: acer (-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.
Frequency neighbours of confusable “ACS”
Peers at similar corpus weight, separate from look-alike pairs below
- abode
abode
75,636 corpus weight
- abomination
abomination
75,635 corpus weight
- acer
acer
75,634 corpus weight
- ACS
ACS
75,633 corpus weight
- acutely
acutely
75,632 corpus weight
- adhering
adhering
75,630 corpus weight
What this shows Bars place “ACS” against nearest ranked English headwords, not a reprint of the confusable-pair desk.
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | ACS |
| Language | English |
| Part of speech | Proper noun |
| Letters | 3 |
| Frequency rank | #24,368 |
| Misspellings tracked | 0 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Corpus rank beside confusables of “ACS”
Easy to mix with look-alikes
The spelling risk for ACS is neighbouring look-alikes ("as", "at", …), not just typos; it is aproper noun. Frequency #24,368 among 3,931 “A” headwords. 6 recorded senses keep meaning in play.
Our edit-distance generator produced no likely misspellings for ACS, a straightforward case of a spelling with little room for common typos. It also participates in 20 confusable-pair relationships, "as", "at", "an", and more, where similar look or sound leads writers to substitute one word for another in context.
This entry's etymology isn't recorded, so its spelling is easiest to reason about phoneme by phoneme, absent a documented history. The correct English form is ACS, spelled A-C-S.
Definition
- 1Initialism of Australian Computer Society.
- 2Initialism of Australian Customs Service.
- 3Initialism of Anglo-Chinese School.
- 4Initialism of American Cancer Society.
- 5Initialism of American Chemical Society.
- 6Initialism of American Community Survey.
Recorded use
Wiktionary exampleThese source excerpts show how ACS appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
The ACS asks all respondents ages 5 and older two questions about language. First, people are asked if they speak a language other than English at home. If they mention a language other than English, they are asked how well they speak English.
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
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "ACS", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 3 letters (nearest by frequency rank).