underpass
"underpass" is a 9-letter English headword indexed on PlainSpell.
The verdict
“underpass” is a moderately-common English word, ranked #49,691 in English word frequency and used as a noun.
- #49,691
- frequency rank, English
- 9
- letters
- 12
- tracked misspellings
- 3
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A passage, especially for pedestrians, that crosses underneath a road, railroad or obstacle.
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 | underpass |
| Language | English |
| Part of speech | Noun |
| Letters | 9 |
| Frequency rank | #49,691 |
| Misspellings tracked | 12 |
| Confusable pairs | 3 |
| Source | Wiktionary (kaikki.org) |
Where “underpass” sits in English frequency
Spelling & Dictionary Insight
The English entry for underpass is 9 letters long, classified as a noun. Corpus data places it at rank #49,691 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. The dominant gloss from Wiktionary reads: "A passage, especially for pedestrians, that crosses underneath a road, railroad or obstacle.".
Our generated misspelling index lists 12 likely wrong-spelling variants for underpass, with forms such as "nuderpass", "udnerpass", and "undderpass". Each variant is a distinct typo pattern an edit-distance generator flags, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution. It also participates in 3 confusable-pair relationships, "underpaid", "underpants", "underclass", since the words sound or look close enough that writers reach for the wrong one mid-sentence.
Etymologically, the entry records: From under- + pass. The correct English form is underpass, spelled U-N-D-E-R-P-A-S-S.
Definition
- 1A passage, especially for pedestrians, that crosses underneath a road, railroad or obstacle.
Etymology
From under- + pass.
This word in other languages
Common misspellings
Also misspelled as: nuderpass,udnerpass,undderpass,undeprass,underapss,underpas,underppass,underpsas,underrpass,undrepass,unedrpass,unnderpass
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of underpass - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.
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
How do you spell "underpass"?
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Using “underpass”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is U-N-D-E-R-P-A-S-S - every other letter order is a misspelling in standard orthography.
- Don't mix it up with “underpaid” - see the side-by-side comparison. underpass vs underpaid
- Browse more English words and confusable pairs in the same reference. English words
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.