PII
"pii" is a 3-letter English headword indexed on PlainSpell.
The verdict
“PII” is uncommon English (frequency #69,338 among 46,516 “P” headwords), classed as a noun. The kind of spelling people second-guess.
- #69,338
- frequency rank, English
- 46,516
- “P” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Initialism of personally identifiable information; personal data.
Corpus desk
Index EN-pii · PII · English
PII · rank #69,338 · 0 variants · 0 confusables
- FREQ-RARE #69,338
- LEN-MID 3 letters
- VOW-2 2 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-DENSE 46,516
- PHOTO-FINISH plod
Nearest frequency peer: plod (+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 “PII”
Lower corpus rank = more everyday usage (inverted bar length for readability)
- photobook
photobook
30,666 corpus weight
- photovoltai…
photovoltaics
30,665 corpus weight
- PII
PII
30,663 corpus weight
- plod
plod
30,662 corpus weight
- plucks
plucks
30,661 corpus weight
- Pocatello
Pocatello
30,660 corpus weight
What this shows Bars show where “PII” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.
| Property | Value |
|---|---|
| Headword | PII |
| Language | English |
| Part of speech | Noun |
| Letters | 3 |
| Frequency rank | #69,338 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “PII” sits in English frequency
Rare enough to double-check
PII is uncommon English at frequency #69,338 among 46,516 “P” headwords, classed as anoun. Rarity is why readers land here mid-draft. 2 senses are on record.
We couldn't generate a plausible misspelling set for PII, since its letter sequence doesn't invite the usual edit-distance slips. No close-neighbour confusable shows up for this headword in our dataset, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.
No documented word history exists for this headword, so any spelling logic here comes from how the word's sounds map to letters, not a documented origin story. The correct English form is PII, spelled P-I-I.
Definition
- 1Initialism of personally identifiable information; personal data.
- 2Initialism of public-interest immunity.
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.
PlainSpell is rendered directly from structured Wiktionary extracts and open word-frequency lists, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 6, 2026. Primary sources: Wiktionary (via kaikki.org) and FrequencyWords.
Frequently Asked Questions
How do you spell "PII"?
What does "PII" mean?
What language does "PII" come from?
Is PlainSpell free to use?
Similar English words by spelling shape
Same letter count and similar misspelling depth for "PII", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 3 letters (nearest by frequency rank).
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.