SSO
"sso" is a 3-letter English headword indexed on PlainSpell.
The verdict
“SSO” is uncommon English (frequency #57,094 among 6,566 “S” headwords), classed as a noun. The kind of spelling people second-guess.
- #57,094
- frequency rank, English
- 6,566
- “S” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Initialism of single sign-on.
Corpus desk
Index EN-sso · SSO · English
SSO · rank #57,094 · 0 variants · 0 confusables
- FREQ-RARE #57,094
- LEN-MID 3 letters
- VOW-1 1 vowel
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-DENSE 6,566
- PHOTO-FINISH SRM
Nearest frequency peer: SRM (-1 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.
Long-tail ranks near “SSO”
Sparse band: bars invert rank so rarer forms read shorter
- spiritualist
spiritualist
42,911 corpus weight
- Srebrenica
Srebrenica
42,909 corpus weight
- SRM
SRM
42,908 corpus weight
- SSO
SSO
42,907 corpus weight
- Stalinism
Stalinism
42,905 corpus weight
- Stiglitz
Stiglitz
42,903 corpus weight
What this shows Long-tail view: where “SSO” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | SSO |
| Language | English |
| Part of speech | Noun |
| Letters | 3 |
| Frequency rank | #57,094 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “SSO” in English
Rare enough to double-check
SSO is uncommon English at frequency #57,094 among 6,566 “S” headwords, classed as anoun. Rarity is why readers land here mid-draft. 5 senses are on record.
Our edit-distance generator produced no likely misspellings for SSO, which points to an orthography that plays by predictable English rules. This entry stands alone in our confusable dataset, since its spelling is unusual enough that it doesn't cluster with a lookalike.
This headword's origin isn't recorded in our source data, so spelling patterns must be inferred from the word's phoneme-to-grapheme mapping rather than from a documented borrowing chain. The correct English form is SSO, spelled S-S-O.
Definition
- 1Initialism of single sign-on.
- 2Initialism of shared services organization.
- 3Initialism of sub-stellar object.
- 4Initialism of sun-synchronous orbit.
- 5Initialism of systematic social observation.
Recorded use
Wiktionary exampleThese source excerpts show how SSO appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
Physical disorder measured in the SSO is only moderately correlated with rates of predatory crime measured by police-recorded rates of homicide, robbery, and burglary.
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.
Frequently Asked Questions
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "SSO", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 3 letters (nearest by frequency rank).