Which to use
“algo” and “alum” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #49,758
- “algo” frequency rank
- #20,832
- “alum” frequency rank
- 70590
- confusion score
Side-by-Side Comparison
| Feature | algo | alum |
|---|---|---|
| Definition | Clipping of algorithm. | An astringent salt, usually occurring in the form of pale crystals, much used in the dyeing and tanning trade and in certain medicines, and now understood to be a double sulphate of potassium and aluminium (K₂SO₄·Al₂(SO₄)₃·24H₂O). |
Where the eye mixes algo and alum
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. algo (VCCV) and alum (VCVC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Visual trap between algo and alum
A purely visual mix-up. algo (/ˈæl.ɡoʊ̯/) and alum (/ˈæl.əm/) 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 70590, derived from the frequency rank of both members and their visual similarity.
algo is recorded at frequency rank #49,758, classified as anoun, pronounced /ˈæl.ɡoʊ̯/. alum is at rank #20,832, tagged as anoun, pronounced /ˈæl.əm/.
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 70590, this pair ranks #49,968 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of algo vs alum
Shared letters: al. Private to "algo": go. Private to "alum": mu.
"algo" · 4 letters · shape VCCV · "alum" · 4 letters · shape VCVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "algo" for "alum" ever safe?
In ordinary English text, does "algo" or "alum" show up more?
Useful next steps
Eye-level mix-up between "algo" and "alum" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "algo" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "alum" - compare definitions side by side with the headword page. Word entry
- This pair ranks #49,968 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "algo" and "alum" also get mixed up with nearby pairs, the highest-scored neighbour is "alc vs algo". 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 #49,968 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.