ruinous
/ˈɹuː.ɪnəs/
"ruinous" is a 7-letter English headword indexed on PlainSpell.
The verdict
“ruinous” is a moderately-common English word, ranked #42,393 in English word frequency and used as an adjective.
- #42,393
- frequency rank, English
- 7
- letters
- 9
- tracked misspellings
- 2
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Causing ruin; destructive, calamitous.
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 | ruinous |
| Language | English |
| Part of speech | Adjective |
| IPA | /ˈɹuː.ɪnəs/ |
| Letters | 7 |
| Frequency rank | #42,393 |
| Misspellings tracked | 9 |
| Confusable pairs | 2 |
| Source | Wiktionary (kaikki.org) |
Where “ruinous” sits in English frequency
Spelling & Dictionary Insight
The English entry for ruinous is 7 letters long, classified as an adjective, and transcribed in the International Phonetic Alphabet as /ˈɹuː.ɪnəs/. Corpus data places it at rank #42,393 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 3 distinct senses for this headword, so context determines which meaning a reader should apply.
Our generated misspelling index lists 9 likely wrong-spelling variants for ruinous, with forms such as "riunous", "rruinous", and "ruinnous". 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 2 confusable-pair relationships, "ruins", "Rhinos", a pairing that trips writers up because the two words share enough sound or shape to blur together.
Etymologically, the entry records: From Middle English ruynous, from Old French ruinos, ruineus, from Latin ruīnōsus. By surface analysis, ruin + -ous. The correct English form is ruinous, spelled R-U-I-N-O-U-S.
Definition
- 1Causing ruin; destructive, calamitous.
- 2Extremely costly; so expensive as to cause financial ruin.
- 3Characterized by ruin; ruined; dilapidated; as, an edifice, bridge, or wall in a ruinous state.
Etymology
From Middle English ruynous, from Old French ruinos, ruineus, from Latin ruīnōsus. By surface analysis, ruin + -ous.
Synonyms
This word in other languages
Common misspellings
Also misspelled as: riunous,rruinous,ruinnous,ruinosu,ruinouss,ruinuos,ruionus,runious,urinous
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of ruinous - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.
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 “ruinous”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is R-U-I-N-O-U-S - every other letter order is a misspelling in standard orthography.
- Say it as /ˈɹuː.ɪnəs/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “ruins” - see the side-by-side comparison. ruinous vs ruins
- 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.