aidvsauldWhich spelling fits?

Quick tell: aid is a noun, auld is an adjective, so they fill different roles in a sentence.

Which to use

“aid” is a noun and “auld” is an adjective - they look or sound alike but fill different roles in a sentence.

#1,808
“aid” frequency rank
#31,071
“auld” frequency rank
32879
confusion score

Side-by-Side Comparison

Feature aid auld
Definition Help; assistance; succor, relief. Old.

Where the eye mixes aid and auld

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

3 ch
aid
4 ch
auld

Visual trap between aid and auld

These two trip readers on the page rather than in the ear: aid is /eɪd/ while auld is /oʊld/. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 32879, derived from the frequency rank of both members and their visual similarity.

aid is recorded at frequency rank #1,808, classified as anoun, pronounced /eɪd/. 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 32879, this pair ranks #334,128 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of aid vs auld

Shared letters: ad. Private to "aid": i. Private to "auld": lu.

"aid" · 3 letters · shape VVC  ·  "auld" · 4 letters · shape VVCC

Known mistypes of this pair

  • auldalud · audl · auldd · aulld · uald

Frequently Asked Questions

Is swapping "aid" for "auld" ever safe?
No - they are not even the same part of speech. "aid" is a noun and "auld" an adjective, so a sentence built for one is usually ungrammatical with the other.
In ordinary English text, does "aid" or "auld" show up more?
"aid" is the more common of the two: it sits at frequency rank #1,808 in our English list, against #31,071 for "auld". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "aid" 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 #334,128 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "aid" and "auld" also get mixed up with nearby pairs, the highest-scored neighbour is "alc vs auld". 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 #334,128 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