parallax
/ˈpæɹ.əˌlæks/
"parallax" is a 8-letter English headword indexed on PlainSpell.
The verdict
“parallax” is a moderately-common English word, ranked #35,011 in English word frequency and used as a noun.
- #35,011
- frequency rank, English
- 8
- letters
- 10
- tracked misspellings
- 1
- confusable pair
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - An apparent shift in the position of two stationary objects relative to each other as viewed by an observer, due to a change in observer position.
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 | parallax |
| Language | English |
| Part of speech | Noun |
| IPA | /ˈpæɹ.əˌlæks/ |
| Letters | 8 |
| Frequency rank | #35,011 |
| Misspellings tracked | 10 |
| Confusable pairs | 1 |
| Source | Wiktionary (kaikki.org) |
Where “parallax” sits in English frequency
Spelling & Dictionary Insight
The English entry for parallax is 8 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /ˈpæɹ.əˌlæks/. Corpus data places it at rank #35,011 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 2 distinct senses for this headword, so context determines which meaning a reader should apply.
Our generated misspelling index lists 10 likely wrong-spelling variants for parallax, with forms such as "aprallax", "paarllax", and "paralalx". 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 1 confusable-pair relationship, "parallel", a pairing that trips writers up because the two words share enough sound or shape to blur together.
Etymologically, the entry records: From Middle French parallaxe, from Ancient Greek παράλλαξις (parállaxis, “alteration”) from παραλλάσσω (parallássō, “to cause to alternate”) from ἀλλάσσω (allássō, “to alter”) from ἄλλος (állos, “other”). By surface analysis, par- + all- + -ax. The correct English form is parallax, spelled P-A-R-A-L-L-A-X.
Definition
- 1An apparent shift in the position of two stationary objects relative to each other as viewed by an observer, due to a change in observer position.
- 2The angle of seeing of the astronomical unit.
Etymology
From Middle French parallaxe, from Ancient Greek παράλλαξις (parállaxis, “alteration”) from παραλλάσσω (parallássō, “to cause to alternate”) from ἀλλάσσω (allássō, “to alter”) from ἄλλος (állos, “other”). By surface analysis, par- + all- + -ax.
This word in other languages
Common misspellings
Also misspelled as: aprallax,paarllax,paralalx,paralax,parallaxx,parallxa,parlalax,parrallax,pparallax,praallax
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of parallax - counted as single-character edits (an insertion, a deletion, or a substituted letter). The larger the bar, the easier the typo is to spot; one-edit slips are the ones that sneak past readers.
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 "parallax"?
What does "parallax" mean?
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Using “parallax”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is P-A-R-A-L-L-A-X - every other letter order is a misspelling in standard orthography.
- Say it as /ˈpæɹ.əˌlæks/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “parallel” - see the side-by-side comparison. parallax vs parallel
- 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.