undoubtedly
/ʌnˈdaʊtɪdli/
"undoubtedly" is a 11-letter English headword indexed on PlainSpell.
The verdict
“undoubtedly” has 17 generated spelling variants in the English index at frequency #8,621. The variants make it a useful spelling check.
- #8,621
- frequency rank, English
- 1,433
- “U” headwords
- 17
- tracked misspellings
- 1
- confusable pair
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Without doubt; definitely.
Corpus desk
Index EN-undoubtedly · undoubtedly · English
undoubtedly · rank #8,621 · 17 variants · 1 confusable
- FREQ-COMMON #8,621
- LEN-MEGA 11 letters
- VOW-5 5 vowels
- CONFUS-LOW 1 pairs
- VAR-HIGH 17 variants
- BOOK-MID 1,433
- PHOTO-FINISH tribunal
Nearest frequency peer: tribunal (-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 “undoubtedly”
Lower corpus rank = more everyday usage (inverted bar length for readability)
- thief
thief
91,383 corpus weight
- transported
transported
91,382 corpus weight
- tribunal
tribunal
91,381 corpus weight
- undoubtedly
undoubtedly
91,380 corpus weight
- uniforms
uniforms
91,379 corpus weight
- verify
verify
91,378 corpus weight
What this shows Bars show where “undoubtedly” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.
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 | undoubtedly |
| Language | English |
| Part of speech | Adverb |
| IPA | /ʌnˈdaʊtɪdli/ |
| Letters | 11 |
| Frequency rank | #8,621 |
| Misspellings tracked | 17 |
| Confusable pairs | 1 |
| Source | Wiktionary (kaikki.org) |
Where “undoubtedly” sits in English frequency
A misspelling magnet
The generator records 17 spelling variants around undoubtedly (IPA /ʌnˈdaʊtɪdli/), anadverb. Corpus frequency is #8,621 among 1,433 “U” headwords. Dominant gloss: "Without doubt; definitely.".
Our generated misspelling index lists 17 likely wrong-spelling variants for undoubtedly, with forms such as "nudoubtedly", "udnoubtedly", and "unddoubtedly". 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 1 confusable-pair relationship, "undoubted", where similar look or sound leads writers to substitute one word for another in context.
Etymologically, the entry records: From Middle English undoutedly, equivalent to undoubted + -ly. The correct English form is undoubtedly, spelled U-N-D-O-U-B-T-E-D-L-Y.
Definition
- 1Without doubt; definitely.
Recorded use
Wiktionary examplesThese source excerpts show how undoubtedly appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
The cane was undoubtedly of foreign make, for it had a solid silver ferrule at one end, which was not English hall–marked.
He declared that these drastic steps would undoubtedly inconvenience a good many people, but the alternative was bankruptcy of the Ulster Transport Authority and the breakdown of public transport services.
Etymology
From Middle English undoutedly, equivalent to undoubted + -ly.
This word in other languages
Common misspellings
Also misspelled as:
- nudoubtedly
- udnoubtedly
- unddoubtedly
- undobutedly
- undoubbtedly
- undoubetdly
- undoubtdely
- undoubteddly
- undoubtedlly
- undoubtedlyy
- undoubtedyl
- undoubteldy
- undoubttedly
- undoutbedly
- unduobtedly
- unndoubtedly
- unodubtedly
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of undoubtedly - 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 "undoubtedly"?
What does "undoubtedly" mean?
What words are commonly confused with "undoubtedly"?
How do you pronounce "undoubtedly"?
What is the origin of the word "undoubtedly"?
Is PlainSpell free to use?
Similar English words by spelling shape
Same letter count and similar misspelling depth for "undoubtedly", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 11 letters (nearest by frequency rank).
Similar misspelling depth
Headwords with a similar count of attested misspellings (17 here; floor ≥5).
What to do next
You've looked up "undoubtedly". Here's where to go from here.
- This headword has one recorded confusable pair with "undoubted". View pair
- 17 edit-distance misspelling variants are generated for spell-check research on this headword. See variants
- Usage frequency rank #8,621 among English headwords in this corpus. Corpus statistics
- Browse more English words in the "U" letter cohort. U–Z browse
- PlainSpell rotates a curated Word of the Day from the English corpus, a passive way to discover vocabulary. Word of the Day
PlainSpell is a reference corpus, not spelling advice. Verify unusual forms in context.
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.