soundness
"soundness" is a 9-letter English headword indexed on PlainSpell.
The verdict
“soundness” has 12 generated spelling variants in the English index at frequency #49,642. The variants make it a useful spelling check.
- #49,642
- frequency rank, English
- 6,566
- “S” headwords
- 12
- tracked misspellings
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The state or quality of being sound.
Corpus desk
Index EN-soundness · soundness · English
soundness · rank #49,642 · 12 variants · 0 confusables
- FREQ-MID #49,642
- LEN-LONG 9 letters
- VOW-3 3 vowels
- CONFUS-0 No pairs
- VAR-MID 12 variants
- BOOK-DENSE 6,566
- PHOTO-FINISH slurp
Nearest frequency peer: slurp (-3 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.
Rank peers near misspelling magnet “soundness”
Same rarity band: useful when a typo lands on a peer headword
- Sif
Sif
50,365 corpus weight
- skirted
skirted
50,364 corpus weight
- sleepiness
sleepiness
50,363 corpus weight
- slurp
slurp
50,362 corpus weight
- soundness
soundness
50,359 corpus weight
- springbok
springbok
50,355 corpus weight
What this shows “soundness” sits among these FrequencyWords peers; misspelling depth is tracked separately in the edit-distance chart.
| Property | Value |
|---|---|
| Headword | soundness |
| Language | English |
| Part of speech | Noun |
| Letters | 9 |
| Frequency rank | #49,642 |
| Misspellings tracked | 12 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Frequency seat of misspelling magnet “soundness”
A misspelling magnet
The generator records 12 spelling variants around soundness, anoun. Corpus frequency is #49,642 among 6,566 “S” headwords. Wiktionary lists 4 senses, so context still picks the gloss.
Our generated misspelling index lists 12 likely wrong-spelling variants for soundness, with forms such as "osundness", "sonudness", and "soudnness". Every one of these variants traces to a single-character edit -- an added or dropped letter, a swapped consonant, or a vowel swap -- the kind of slip a spell-checker is built to catch. Our confusable-pair dataset has no match for it, since its spelling is unusual enough that it doesn't cluster with a lookalike.
Etymologically, the entry records: From Middle English soundenes, soundnes, from Old English *sundnes, *ġesundnes (attested in onsundnes), from Proto-West Germanic *sundnassī (“soundness, health”); equivalent to sound + -ness. Cognate with West Frisian sûnens (“soundness, health”), Middle Lo… The correct English form is soundness, spelled S-O-U-N-D-N-E-S-S.
Definition
- 1The state or quality of being sound.
- 2The result or product of being sound.
- 3The property (of an argument) of not only being valid, but also of having true premises.
- 4The property of a logical theory that whenever a wff is a theorem then it must also be valid. Symbolically, letting T represent a theory within logic L, this can be represented as the property that whenever T⊢φ is true, then T⊨φ must also be true, for any wff φ of logic L.
Etymology
From Middle English soundenes, soundnes, from Old English *sundnes, *ġesundnes (attested in onsundnes), from Proto-West Germanic *sundnassī (“soundness, health”); equivalent to sound + -ness. Cognate with West Frisian sûnens (“soundness, health”), Middle Low German suntnisse (“soundness, health”), Middle High German suntnisse (“soundness, health”), German Gesundnis (“health”).
This word in other languages
Common misspellings
Also misspelled as:
- osundness
- sonudness
- soudnness
- sounddness
- soundenss
- soundnes
- soundnness
- soundnses
- sounndess
- sounndness
- ssoundness
- suondness
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of soundness - expressed in single-character edits (insert, delete, or swap one letter). Bigger bars stand out at a glance; a one-edit slip is the hardest to catch.
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 "soundness"?
What does "soundness" mean?
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "soundness", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 9 letters (nearest by frequency rank).
Similar misspelling depth
Headwords with a similar count of attested misspellings (12 here; floor ≥5).