Which to use
“soi” and “spa” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #34,694
- “soi” frequency rank
- #7,611
- “spa” frequency rank
- 42305
- confusion score
Side-by-Side Comparison
| Feature | soi | spa |
|---|---|---|
| Definition | In Thailand, a side-street branching off a major street; an alley or lane. | A health resort near a mineral spring or hot spring. |
Letter map: soi vs spa
Shared letters muted; letters that set soi and spa apart highlighted. Shared run: 1.
Spelling & dictionary notes on soi vs spa
soi and spa are indexed as a confusable English pair. We have no recorded pronunciation or part of speech for both members, so the spelling overlap is what we can show you: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 42305, derived from the frequency rank of both members and their visual similarity.
soi is recorded at frequency rank #34,694, classified as anoun. spa is at rank #7,611, tagged as anoun, pronounced /ˈspɑː/.
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 42305, this pair ranks #250,460 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of soi vs spa
Shared letters: s. Private to "soi": io. Private to "spa": ap.
"soi" · 3 letters · shape CVV · "spa" · 3 letters · shape CCV
Frequently Asked Questions
Is swapping "soi" for "spa" ever safe?
Frequency check: "soi" vs "spa" - which ranks higher?
After this comparison
You've compared "soi" and "spa". Here's where to go from here.
- Full dictionary entry for "soi" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "spa" - compare definitions side by side with the headword page. Word entry
- This pair ranks #250,460 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "soi" and "spa" also get mixed up with nearby pairs, the highest-scored neighbour is "Sif vs soi". Nearby pair
Confusion rank #250,460 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.