additional
/əˈdɪʃənəl/
"additional" is a 10-letter English headword indexed on PlainSpell.
The verdict
“additional” is a regularly-used English word, ranked #1,115 in English word frequency and used as an adjective.
- #1,115
- frequency rank, English
- 10
- letters
- 12
- tracked misspellings
- 3
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Supplemental or added to something.
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 | additional |
| Language | English |
| Part of speech | Adjective |
| IPA | /əˈdɪʃənəl/ |
| Letters | 10 |
| Frequency rank | #1,115 |
| Misspellings tracked | 12 |
| Confusable pairs | 3 |
| Source | Wiktionary (kaikki.org) |
Where “additional” sits in English frequency
Spelling & Dictionary Insight
The English entry for additional is 10 letters long, classified as an adjective, and transcribed in the International Phonetic Alphabet as /əˈdɪʃənəl/. Corpus data places it at rank #1,115 in overall English word frequency, indicating it appears regularly in written and spoken text. The dominant gloss from Wiktionary reads: "Supplemental or added to something.".
Our generated misspelling index lists 12 likely wrong-spelling variants for additional, with forms such as "addiitonal", "additinoal", and "additioanl". 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, "additions", "additionally", "addition", where similar look or sound leads writers to substitute one word for another in context.
Etymologically, the entry records: From addition + -al. The correct English form is additional, spelled A-D-D-I-T-I-O-N-A-L.
Definition
- 1Supplemental or added to something.
Etymology
From addition + -al.
Synonyms
Antonyms
This word in other languages
Common misspellings
Also misspelled as: addiitonal,additinoal,additioanl,additionall,additionla,additionnal,additoinal,addittional,addtiional,adidtional,aditional,daditional
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of additional - counted as single-character edits (an insertion, a deletion, or a substituted letter). The larger the bar, the easier the typo is to spot; one-edit slips are the ones that sneak past readers.
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 “additional”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is A-D-D-I-T-I-O-N-A-L - every other letter order is a misspelling in standard orthography.
- Say it as /əˈdɪʃənəl/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “additions” - see the side-by-side comparison. additional vs additions
- 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.