Which to use
“aches” and “acids” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #20,025
- “aches” frequency rank
- #8,884
- “acids” frequency rank
- 28909
- confusion score
Side-by-Side Comparison
| Feature | aches | acids |
|---|---|---|
| Definition | plural of ache | plural of acid |
Where the eye mixes aches and acids
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Why the eye confuses aches with acids
A purely visual mix-up. aches (/eɪks/) and acids (/ˈæ.sɪdz/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 28909, derived from the frequency rank of both members and their visual similarity.
aches is recorded at frequency rank #20,025, classified as anoun, pronounced /eɪks/. acids is at rank #8,884, tagged as anoun, pronounced /ˈæ.sɪdz/.
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 28909, this pair ranks #367,323 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of aches vs acids
Shared letters: acs. Private to "aches": eh. Private to "acids": di.
"aches" · 5 letters · shape VCCVC · "acids" · 5 letters · shape VCVCC
Known mistypes of this pair
Frequently Asked Questions
Can "aches" and "acids" be used interchangeably?
Frequency check: "aches" vs "acids" - which ranks higher?
After this comparison
Eye-level mix-up between "aches" and "acids" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "aches" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "acids" - compare definitions side by side with the headword page. Word entry
- This pair ranks #367,323 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "aches" and "acids" also get mixed up with nearby pairs, the highest-scored neighbour is "Aachen vs aches". 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 #367,323 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.