subspace
/ˈsʌb.speɪs/
"subspace" is a 8-letter English headword indexed on PlainSpell.
The verdict
“subspace” is a moderately-common English word, ranked #33,436 in English word frequency and used as a noun.
- #33,436
- frequency rank, English
- 8
- letters
- 12
- tracked misspellings
- 1
- confusable pair
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A subset of a space which is a space in its own right.
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 | subspace |
| Language | English |
| Part of speech | Noun |
| IPA | /ˈsʌb.speɪs/ |
| Letters | 8 |
| Frequency rank | #33,436 |
| Misspellings tracked | 12 |
| Confusable pairs | 1 |
| Source | Wiktionary (kaikki.org) |
Where “subspace” sits in English frequency
Spelling & Dictionary Insight
The English entry for subspace is 8 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /ˈsʌb.speɪs/. Corpus data places it at rank #33,436 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 12 likely wrong-spelling variants for subspace, with forms such as "sbuspace", "ssubspace", and "subbspace". Each of these forms differs from the correct spelling by one small edit: a doubled letter, a dropped silent letter, or a substituted vowel. It also participates in 1 confusable-pair relationship, "substance", a pairing that trips writers up because the two words share enough sound or shape to blur together.
Etymologically, the entry records: From sub- + space. The correct English form is subspace, spelled S-U-B-S-P-A-C-E.
Definition
- 1A subset of a space which is a space in its own right.
- 2Any (often unspecified) method of communicating or travelling faster than light speed.
- 3An alternative dimension or universe, access to or use of which permits faster-than-light travel or communications; hyperspace.
Etymology
From sub- + space.
This word in other languages
Common misspellings
Also misspelled as: sbuspace,ssubspace,subbspace,subpsace,subsapce,subspacce,subspaec,subspcae,subsppace,subsspace,susbpace,usbspace
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of subspace - 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
How do you spell "subspace"?
What does "subspace" mean?
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Is PlainSpell free to use?
Using “subspace”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is S-U-B-S-P-A-C-E - every other letter order is a misspelling in standard orthography.
- Say it as /ˈsʌb.speɪs/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “substance” - see the side-by-side comparison. subspace vs substance
- 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.