soi

noun

By · According to Wiktionary data (CC BY-SA) ·

"soi" is a 3-letter English headword indexed on PlainSpell.

The verdict

“soi” sits in 20 confusable pairs (corpus #34,694) as a noun. The look-alike neighbours are the real trap.

#34,694
frequency rank, English
6,566
“S” headwords
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - In Thailand, a side-street branching off a major street; an alley or lane.

Corpus desk

Index EN-soi · soi · English

soi · rank #34,694 · 0 variants · 20 confusables

  • FREQ-MID #34,694
  • LEN-MID 3 letters
  • VOW-2 2 vowels
  • CONFUS-HIGH 20 pairs
  • VAR-0 0 variants
  • BOOK-DENSE 6,566
  • PHOTO-FINISH Sodom

Nearest frequency peer: Sodom (-2 rank slots)

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Frequency neighbourhood for “soi”

Lower corpus rank = more everyday usage (inverted bar length for readability)

corpus weight

What this shows Bars show where “soi” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.

Source FrequencyWords open word-frequency list As of September 3, 2026

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

soi vs SS
0% similar
soi vs SP
0% similar
soi vs su
33% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for soi
PropertyValue
Headwordsoi
LanguageEnglish
Part of speechNoun
Letters3
Frequency rank#34,694
Misspellings tracked0
Confusable pairs20
SourceWiktionary (kaikki.org)

Where “soi” sits in English frequency

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right). soi lands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Easy to mix with look-alikes

The spelling risk for soi is neighbouring look-alikes ("SS", "SP", …), not just typos; it is anoun. Frequency #34,694 among 6,566 “S” headwords. Gloss: "In Thailand, a side-street branching off a major street; an alley or lane.".

Zero misspellings are on record for soi in our index, since its letter sequence doesn't invite the usual edit-distance slips. It also participates in 20 confusable-pair relationships, "SS", "SP", "su", and more, since the words sound or look close enough that writers reach for the wrong one mid-sentence.

Etymologically, the entry records: From Thai ซอย (sɔɔi). The correct English form is soi, spelled S-O-I.

Definition

  1. 1
    In Thailand, a side-street branching off a major street; an alley or lane.

Recorded use

Wiktionary example

These source excerpts show how soi appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. When a motorbike sped too fast down their little side street, … Daeng and Nat would be revisiting many ranting conversations they'd had about motorbikes treating this tiny soi like it was the highway.

Etymology

From Thai ซอย (sɔɔi).

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

PlainSpell is rendered directly from structured Wiktionary extracts and open word-frequency lists, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of September 3, 2026. Primary sources: Wiktionary (via kaikki.org) and FrequencyWords.

Frequently Asked Questions

How do you spell "soi"?
"soi" is spelled S-O-I.
What does "soi" mean?
As a noun, "soi" means: In Thailand, a side-street branching off a major street; an alley or lane.
What words are commonly confused with "soi"?
"soi" is commonly confused with "SS", "SP", "su". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
What is the origin of the word "soi"?
From Thai ซอย (sɔɔi). See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "soi", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 3 letters (nearest by frequency rank).

Siu#34,689sei#34,681PRS#34,651urs#34,739

What to do next

You've looked up "soi". Here's where to go from here.

  • "soi" maps to 20 confusable pairs in this vintage; the highest-scored is "SS". View pair
  • Usage frequency rank #34,694 among English headwords in this corpus. Corpus statistics
  • Browse more English words in the "S" letter cohort. S–Z browse
  • PlainSpell rotates a curated Word of the Day from the English corpus, a passive way to discover vocabulary. Word of the Day

PlainSpell is a reference corpus, not spelling advice. Verify unusual forms in context.

Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list