SCI
"sci" is a 3-letter English headword indexed on PlainSpell.
The verdict
“SCI” sits in 20 confusable pairs (corpus #7,845) as a noun. The look-alike neighbours are the real trap.
- #7,845
- frequency rank, English
- 6,566
- “S” headwords
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Initialism of secured compartmentalized information/secured compartmented information.
Corpus desk
Index EN-sci · SCI · English
SCI · rank #7,845 · 0 variants · 20 confusables
- FREQ-COMMON #7,845
- LEN-MID 3 letters
- VOW-1 1 vowel
- CONFUS-HIGH 20 pairs
- VAR-0 0 variants
- BOOK-DENSE 6,566
- PHOTO-FINISH scam
Nearest frequency peer: scam (-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.
Frequency neighbours of confusable “SCI”
Peers at similar corpus weight, separate from look-alike pairs below
- risky
risky
92,159 corpus weight
- robust
robust
92,158 corpus weight
- scam
scam
92,157 corpus weight
- SCI
SCI
92,156 corpus weight
- SEP
SEP
92,155 corpus weight
- sided
sided
92,153 corpus weight
What this shows Bars place “SCI” against nearest ranked English headwords, not a reprint of the confusable-pair desk.
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | SCI |
| Language | English |
| Part of speech | Noun |
| Letters | 3 |
| Frequency rank | #7,845 |
| Misspellings tracked | 0 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Corpus rank beside confusables of “SCI”
Easy to mix with look-alikes
The spelling risk for SCI is neighbouring look-alikes ("so", "se", …), not just typos; it is anoun. Frequency #7,845 among 6,566 “S” headwords. 3 recorded senses keep meaning in play.
No misspelling variants are generated for SCI in our index, a straightforward case of a spelling with little room for common typos. It also participates in 20 confusable-pair relationships, "so", "se", "SI", and more, where similar look or sound leads writers to substitute one word for another in context.
Wiktionary doesn't record an etymology for this headword, so its spelling is best explained by sound-to-letter mapping rather than etymology. The correct English form is SCI, spelled S-C-I.
Definition
- 1Initialism of secured compartmentalized information/secured compartmented information.
- 2Science Citation Index
- 3Abbreviation of spinal cord injury.
Recorded use
Wiktionary exampleThese source excerpts show how SCI appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
Although government regulations require that hearings be held before security clearances can be revoked, military officials appear to consider revocation of SCI clearances, which are higher than top secret, an exception.
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 "SCI", not the corpus desk frequency band.