undeliverable
"undeliverable" is a 13-letter English headword indexed on PlainSpell.
The verdict
“undeliverable” is uncommon English (frequency #94,383 among 23,789 “U” headwords), classed as an adjective. The kind of spelling people second-guess.
- #94,383
- frequency rank, English
- 23,789
- “U” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Not able to be delivered.
| Property | Value |
|---|---|
| Headword | undeliverable |
| Language | English |
| Part of speech | Adjective |
| Letters | 13 |
| Frequency rank | #94,383 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “undeliverable” sits in English frequency
Rare enough to double-check
undeliverable is uncommon English at frequency #94,383 among 23,789 “U” headwords, classed as anadjective. Rarity is why readers land here mid-draft. Gloss: "Not able to be delivered.".
undeliverable doesn't appear in our generated misspelling index, a sign its spelling follows regular English conventions. It is not paired with a close-neighbour confusable in our dataset, since no other headword is close enough in sound or shape to pair with it.
Etymologically, the entry records: From un- + deliverable. The correct English form is undeliverable, spelled U-N-D-E-L-I-V-E-R-A-B-L-E.
Definition
- 1Not able to be delivered.
Etymology
From un- + deliverable.
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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Using “undeliverable”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is U-N-D-E-L-I-V-E-R-A-B-L-E - every other letter order is a misspelling in standard orthography.
- Browse more English words and confusable pairs in the same reference. English words
Other uncommon English words near this 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.