LIGO
"ligo" is a 4-letter English headword indexed on PlainSpell.
The verdict
“LIGO” is uncommon English (frequency #77,865 among 16,425 “L” headwords), classed as a proper noun. The kind of spelling people second-guess.
- #77,865
- frequency rank, English
- 16,425
- “L” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Acronym of Laser Interferometer Gravitational-Wave Observatory, a large-scale physics experiment that successfully detected gravitational waves in 2015.
| Property | Value |
|---|---|
| Headword | LIGO |
| Language | English |
| Part of speech | Proper noun |
| Letters | 4 |
| Frequency rank | #77,865 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “LIGO” sits in English frequency
Rare enough to double-check
LIGO is uncommon English at frequency #77,865 among 16,425 “L” headwords, classed as aproper noun. Rarity is why readers land here mid-draft. Gloss: "Acronym of Laser Interferometer Gravitational-Wave Observatory, a large-scale physics experiment that successfully detected gravitational waves in 2015.".
Our edit-distance generator produced no likely misspellings for LIGO, and the word's spelling is regular enough that our generator found nothing worth flagging. No confusable counterpart is on file for this word, since its spelling is unusual enough that it doesn't cluster with a lookalike.
No borrowing history is documented for this entry, so its spelling is best explained by sound-to-letter mapping rather than etymology. The correct English form is LIGO, spelled L-I-G-O.
Definition
- 1Acronym of Laser Interferometer Gravitational-Wave Observatory, a large-scale physics experiment that successfully detected gravitational waves in 2015.
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 “LIGO”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is L-I-G-O - every other letter order is a misspelling in standard orthography.
- 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.