Caius
/kiːz/
"caius" is a 5-letter English headword indexed on PlainSpell.
The verdict
“Caius” is uncommon English (frequency #50,412 among 5,599 “C” headwords), classed as a proper noun. The kind of spelling people second-guess.
- #50,412
- frequency rank, English
- 5,599
- “C” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Ellipsis of Gonville and Caius College, Cambridge.
Corpus desk
Index EN-caius · Caius · English
Caius · rank #50,412 · 0 variants · 0 confusables
- FREQ-RARE #50,412
- LEN-MID 5 letters
- VOW-3 3 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-DENSE 5,599
- PHOTO-FINISH Cait
Nearest frequency peer: Cait (-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 “Caius”
Sparse band: bars invert rank so rarer forms read shorter
- burnie
burnie
49,593 corpus weight
- cahoots
cahoots
49,591 corpus weight
- Cait
Cait
49,590 corpus weight
- Caius
Caius
49,589 corpus weight
- calender
calender
49,588 corpus weight
- casein
casein
49,585 corpus weight
What this shows Long-tail view: where “Caius” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | Caius |
| Language | English |
| Part of speech | Proper noun |
| IPA | /kiːz/ |
| Letters | 5 |
| Frequency rank | #50,412 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “Caius” in English
Rare enough to double-check
Caius is uncommon English at frequency #50,412 among 5,599 “C” headwords, classed as aproper noun, transcribed /kiːz/. Rarity is why readers land here mid-draft. Gloss: "Ellipsis of Gonville and Caius College, Cambridge.".
The misspelling generator found no plausible variants for Caius, typically a sign the spelling maps closely to how the word sounds. This entry stands alone in our confusable dataset, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.
This headword's origin isn't recorded in our source data, so its spelling is easiest explained by how it's pronounced rather than where it came from. The correct English form is Caius, spelled C-A-I-U-S.
Definition
- 1Ellipsis of Gonville and Caius College, Cambridge.
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 "Caius", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 5 letters (nearest by frequency rank).