PDU
"pdu" is a 3-letter English headword indexed on PlainSpell.
The verdict
“PDU” is uncommon English (frequency #96,346 among 46,516 “P” headwords), classed as a noun. The kind of spelling people second-guess.
- #96,346
- frequency rank, English
- 46,516
- “P” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Initialism of power distribution unit.
Corpus desk
Index EN-pdu · PDU · English
PDU · rank #96,346 · 0 variants · 0 confusables
- FREQ-RARE #96,346
- LEN-MID 3 letters
- VOW-1 1 vowel
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-DENSE 46,516
- PHOTO-FINISH PBI
Nearest frequency peer: PBI (-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 “PDU”
Lower corpus rank = more everyday usage (inverted bar length for readability)
- pawed
pawed
3,659 corpus weight
- payola
payola
3,658 corpus weight
- PBI
PBI
3,656 corpus weight
- PDU
PDU
3,655 corpus weight
- Pentecostal…
Pentecostalism
3,654 corpus weight
- percolator
percolator
3,651 corpus weight
What this shows Bars show where “PDU” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.
| Property | Value |
|---|---|
| Headword | PDU |
| Language | English |
| Part of speech | Noun |
| Letters | 3 |
| Frequency rank | #96,346 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “PDU” sits in English frequency
Rare enough to double-check
PDU is uncommon English at frequency #96,346 among 46,516 “P” headwords, classed as anoun. Rarity is why readers land here mid-draft. 5 senses are on record.
No misspelling variants are generated for PDU in our index, a sign its spelling follows regular English conventions. This entry stands alone in our confusable dataset, since no other headword is close enough in sound or shape to pair with it.
No documented word history exists for this headword, so its spelling is easiest to reason about phoneme by phoneme, absent a documented history. The correct English form is PDU, spelled P-D-U.
Definition
- 1Initialism of power distribution unit.
- 2Initialism of propwash deflection unit.
- 3Initialism of professional development unit.
- 4Initialism of protocol data unit.
- 5Initialism of poor dumb user.
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
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "PDU", 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.