ISRO
/ˈɪs.ɹəʊ/
"isro" is a 4-letter English headword indexed on PlainSpell.
The verdict
“ISRO” is uncommon English (frequency #51,187 among 17,902 “I” headwords), classed as a proper noun. The kind of spelling people second-guess.
- #51,187
- frequency rank, English
- 17,902
- “I” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Acronym of Indian Space Research Organisation, the national space agency of India.
| Property | Value |
|---|---|
| Headword | ISRO |
| Language | English |
| Part of speech | Proper noun |
| IPA | /ˈɪs.ɹəʊ/ |
| Letters | 4 |
| Frequency rank | #51,187 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “ISRO” sits in English frequency
Rare enough to double-check
ISRO is uncommon English at frequency #51,187 among 17,902 “I” headwords, classed as aproper noun, transcribed /ˈɪs.ɹəʊ/. Rarity is why readers land here mid-draft. Gloss: "Acronym of Indian Space Research Organisation, the national space agency of India.".
The misspelling generator found no plausible variants for ISRO, a straightforward case of a spelling with little room for common typos. Our confusable-pair dataset has no match for it, a sign it's visually distinctive enough not to be mixed up with another word.
This headword's origin isn't recorded in our source data, so its spelling is best explained by sound-to-letter mapping rather than etymology. The correct English form is ISRO, spelled I-S-R-O.
Definition
- 1Acronym of Indian Space Research Organisation, the national space agency of India.
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 “ISRO”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is I-S-R-O - every other letter order is a misspelling in standard orthography.
- Say it as /ˈɪs.ɹəʊ/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- 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.