LIGO
"ligo" is a 4-letter English headword indexed on PlainSpell.
The verdict
“LIGO” is uncommon English (frequency #77,865 among 2,297 “L” headwords), classed as a proper noun. The kind of spelling people second-guess.
- #77,865
- frequency rank, English
- 2,297
- “L” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Acronym of Laser Interferometer Gravitational-Wave Observatory, a large-scale physics experiment that successfully detected gravitational waves in 2015.
Corpus desk
Index EN-ligo · LIGO · English
LIGO · rank #77,865 · 0 variants · 0 confusables
- FREQ-RARE #77,865
- LEN-MID 4 letters
- VOW-2 2 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 2,297
- PHOTO-FINISH Lindquist
Nearest frequency peer: Lindquist (+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.
Long-tail ranks near “LIGO”
Sparse band: bars invert rank so rarer forms read shorter
- leftmost
leftmost
22,140 corpus weight
- leis
leis
22,139 corpus weight
- Lemar
Lemar
22,138 corpus weight
- LIGO
LIGO
22,136 corpus weight
- Lindquist
Lindquist
22,135 corpus weight
- Lipschitz
Lipschitz
22,134 corpus weight
What this shows Long-tail view: where “LIGO” sits against similarly uncommon English ranks.
| 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) |
Long-tail rank of “LIGO” in English
Rare enough to double-check
LIGO is uncommon English at frequency #77,865 among 2,297 “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.
Recorded use
Wiktionary exampleThese source excerpts show how LIGO appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
In February 2016, scientists announced that the first direct observation of gravitational waves had been made using just the two LIGO detectors.
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 "LIGO"?
What does "LIGO" mean?
What language does "LIGO" come from?
Is PlainSpell free to use?
Similar English words by spelling shape
Same letter count and similar misspelling depth for "LIGO", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 4 letters (nearest by frequency rank).