K9
/ˈkeɪnaɪn/
"k9" is a 1-letter English headword indexed on PlainSpell.
The verdict
“K9” sits in 20 confusable pairs (corpus #36,625) as a noun. The look-alike neighbours are the real trap.
- #36,625
- frequency rank, English
- 1,236
- “K” headwords
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A trained police dog.
Corpus desk
Index EN-k9 · K9 · English
K9 · rank #36,625 · 0 variants · 20 confusables
- FREQ-MID #36,625
- LEN-SHORT 2 letters
- VOW-0 0 vowels
- CONFUS-HIGH 20 pairs
- VAR-0 0 variants
- BOOK-MID 1,236
- PHOTO-FINISH jumble
Nearest frequency peer: jumble (-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 “K9”
Peers at similar corpus weight, separate from look-alike pairs below
- jeweler
jeweler
63,379 corpus weight
- jumble
jumble
63,377 corpus weight
- K9
K9
63,376 corpus weight
- Kagan
Kagan
63,375 corpus weight
- Kagawa
Kagawa
63,374 corpus weight
- Kala
Kala
63,373 corpus weight
What this shows Bars place “K9” 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 | K9 |
| Language | English |
| Part of speech | Noun |
| IPA | /ˈkeɪnaɪn/ |
| Letters | 2 |
| Frequency rank | #36,625 |
| Misspellings tracked | 0 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Corpus rank beside confusables of “K9”
Easy to mix with look-alikes
The spelling risk for K9 is neighbouring look-alikes ("kI", "ka", …), not just typos; it is anoun pronounced /ˈkeɪnaɪn/. Frequency #36,625 among 1,236 “K” headwords. Gloss: "A trained police dog.".
K9 has no tracked misspelling variants, which points to an orthography that plays by predictable English rules. It also participates in 20 confusable-pair relationships, "kI", "ka", "ky", and more, since the words sound or look close enough that writers reach for the wrong one mid-sentence.
Etymologically, the entry records: Pseudo-acronym of canine, by phonetic similarity of the letter and number names with the two syllables of canine. The correct English form is K9, spelled K-9.
Definition
- 1A trained police dog.
Recorded use
Wiktionary examplesThese source excerpts show how K9 appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
Police working dogs (K9s) often have extremely close bonds with their handlers.
Originally a K9 dog for the police department, Captain was asked to resign for unknown reasons.
Etymology
Pseudo-acronym of canine, by phonetic similarity of the letter and number names with the two syllables of canine.
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.