Ku
"ku" is a 2-letter English headword indexed on PlainSpell.
The verdict
“Ku” sits in 20 confusable pairs (corpus #14,350) as a proper noun. The look-alike neighbours are the real trap.
- #14,350
- frequency rank, English
- 1,236
- “K” headwords
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A surname from Korean.
Corpus desk
Index EN-ku · Ku · English
Ku · rank #14,350 · 0 variants · 20 confusables
- FREQ-MID #14,350
- LEN-SHORT 2 letters
- VOW-1 1 vowel
- CONFUS-HIGH 20 pairs
- VAR-0 0 variants
- BOOK-MID 1,236
- PHOTO-FINISH knowledgeable
Nearest frequency peer: knowledgeable (-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 neighbourhood for “Ku”
Lower corpus rank = more everyday usage (inverted bar length for readability)
- Jonah
Jonah
85,654 corpus weight
- Kerala
Kerala
85,653 corpus weight
- knowledgeab…
knowledgeable
85,652 corpus weight
- Ku
Ku
85,651 corpus weight
- liberated
liberated
85,650 corpus weight
- lingerie
lingerie
85,649 corpus weight
What this shows Bars show where “Ku” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.
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 | Ku |
| Language | English |
| Part of speech | Proper noun |
| Letters | 2 |
| Frequency rank | #14,350 |
| Misspellings tracked | 0 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Where “Ku” sits in English frequency
Easy to mix with look-alikes
The spelling risk for Ku is neighbouring look-alikes ("ky", "kun", …), not just typos; it is aproper noun. Frequency #14,350 among 1,236 “K” headwords. Gloss: "A surname from Korean.".
We couldn't generate a plausible misspelling set for Ku, since its letter sequence doesn't invite the usual edit-distance slips. It also participates in 20 confusable-pair relationships, "ky", "kun", "kyu", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.
Etymologically, the entry records: Borrowed from Korean 쿠 (ku). The correct English form is Ku, spelled K-U.
Definition
- 1A surname from Korean.
Etymology
Borrowed from Korean 쿠 (ku).
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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What to do next
You've looked up "Ku". Here's where to go from here.
- "Ku" maps to 20 confusable pairs in this vintage; the highest-scored is "ky". View pair
- Usage frequency rank #14,350 among English headwords in this corpus. Corpus statistics
- Browse more English words in the "K" letter cohort. K–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.