Which to use
“APL” is a noun and “auld” is an adjective - they look or sound alike but fill different roles in a sentence.
- #48,593
- “APL” frequency rank
- #31,071
- “auld” frequency rank
- 79664
- confusion score
Side-by-Side Comparison
| Feature | APL | auld |
|---|---|---|
| Definition | Initialism of acute promyelocytic leukemia. | Old. |
Letter map: APL vs auld
Shared letters muted; letters that set APL and auld apart highlighted. Shared run: 2. APL runs 3 letters (VCC) against auld's 4 (VVCC) - the length gap alone is often enough to separate them once you know to check it.
Role in the sentence - APL and auld
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: APL is anoun and auldanadjective. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 79664, derived from the frequency rank of both members and their visual similarity.
APL is recorded at frequency rank #48,593, classified as anoun. auld is at rank #31,071, tagged as anadj, pronounced /oʊld/.
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 79664, this pair ranks #21,544 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of APL vs auld
Shared letters: al. Private to "APL": p. Private to "auld": du.
"APL" · 3 letters · shape VCC · "auld" · 4 letters · shape VVCC
Known mistypes of this pair
- auld ← alud · audl · auldd · aulld · uald
Frequently Asked Questions
Is swapping "APL" for "auld" ever safe?
Frequency check: "APL" vs "auld" - which ranks higher?
After this comparison
You've compared "APL" and "auld". Here's where to go from here.
- Full dictionary entry for "APL" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "auld" - compare definitions side by side with the headword page. Word entry
- This pair ranks #21,544 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "APL" and "auld" also get mixed up with nearby pairs, the highest-scored neighbour is "amb vs APL". 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 #21,544 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.