ascvsASCIIWhich spelling fits?

Quick tell: asc is a noun, ASCII is a name, so they fill different roles in a sentence.

Which to use

“asc” is a noun and “ASCII” is a name - they look or sound alike but fill different roles in a sentence.

#29,918
“asc” frequency rank
#31,860
“ASCII” frequency rank
61778
confusion score

Side-by-Side Comparison

Feature asc ASCII
Definition Initialism of Act of Senedd Cymru; formerly called Acts of the National Assembly for Wales, and only used for Acts passed after the change of name. Acronym of American Standard Code for Information Interchange.

Letter map: asc vs ASCII

Shared letters muted; letters that set asc and ASCII apart highlighted. Shared run: 3. asc runs 3 letters (VCC) against ASCII's 5 (VCCVV) - the length gap alone is often enough to separate them once you know to check it.

3 ch
asc
5 ch
ASCII

Role in the sentence - asc and ASCII

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: asc is anoun and ASCIIaname. On the page they differ by 2 extra letter(s) - “asc” sits inside “ASCII”. Our composite confusion score for this pair is 61778, derived from the frequency rank of both members and their visual similarity.

asc is recorded at frequency rank #29,918, classified as anoun. ASCII is at rank #31,860, tagged as aname, pronounced /ˈæski/.

Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.

With a confusion score of 61778, this pair ranks #92,272 of 530,003 scored English confusable pairs - among the most confusable pairs.

Orthographic DNA of asc vs ASCII

Shared letters: acs. Private to "asc": -. Private to "ASCII": i.

"asc" · 3 letters · shape VCC  ·  "ASCII" · 5 letters · shape VCCVV

Known mistypes of this pair

  • ASCII ← acsii · asccii · asci · asici · asscii · sacii

Frequently Asked Questions

Can "asc" and "ASCII" be used interchangeably?
No - they are not even the same part of speech. "asc" is a noun and "ASCII" a name, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "asc" or "ASCII"?
"asc" is the more common of the two: it sits at frequency rank #29,918 in our English list, against #31,860 for "ASCII". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Done with this confusable. These links stay specific to "asc" and "ASCII".

  • Full dictionary entry for "asc" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "ASCII" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #92,272 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "asc" and "ASCII" also get mixed up with nearby pairs, the highest-scored neighbour is "asc vs Asta". Nearby pair
  • Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes

Confusion rank #92,272 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list