IRS
/ˈaɪ.ɑɹ.ɛs/
"irs" is a 3-letter English headword indexed on PlainSpell.
The verdict
“IRS” is a regularly-used English word, ranked #8,440 in English word frequency and used as a proper noun.
- #8,440
- frequency rank, English
- 3
- letters
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Initialism of Internal Revenue Service.
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 | IRS |
| Language | English |
| Part of speech | Proper noun |
| IPA | /ˈaɪ.ɑɹ.ɛs/ |
| Letters | 3 |
| Frequency rank | #8,440 |
| Misspellings tracked | 0 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Where “IRS” sits in English frequency
Spelling & Dictionary Insight
The English entry for IRS is 3 letters long, classified as a proper noun, and transcribed in the International Phonetic Alphabet as /ˈaɪ.ɑɹ.ɛs/. Corpus data places it at rank #8,440 in overall English word frequency, indicating it appears regularly in written and spoken text. Wiktionary records 2 distinct senses for this headword, so context determines which meaning a reader should apply.
No generated misspelling entries exist for IRS in our index, since its letter pattern doesn't lend itself to common typo substitutions. It also participates in 20 confusable-pair relationships, "is", "it", "IV", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.
No borrowing history is documented for this entry, so any spelling logic here comes from how the word's sounds map to letters, not a documented origin story. The correct English form is IRS, spelled I-R-S.
Definition
- 1Initialism of Internal Revenue Service.
- 2Initialism of Indian Revenue Service.
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 “IRS”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is I-R-S - every other letter order is a misspelling in standard orthography.
- Say it as /ˈaɪ.ɑɹ.ɛs/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “is” - see the side-by-side comparison. IRS vs is
- 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.