peroxide

/pəˈrɒksʌɪd/

//pəˈrɒksʌɪd// noun

By · According to Wiktionary data (CC BY-SA) ·

"peroxide" is a 8-letter English headword indexed on PlainSpell.

The verdict

“peroxide” has 11 generated spelling variants in the English index at frequency #24,541. The variants make it a useful spelling check.

#24,541
frequency rank, English
4,417
“P” headwords
11
tracked misspellings
1
confusable pair

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A divalent radical or anion containing two oxygen atoms linked by a covalent bond; any substance containing this group yields hydrogen peroxide when treated with an acid.

Corpus desk

Index EN-peroxide · peroxide · English

peroxide · rank #24,541 · 11 variants · 1 confusable

  • FREQ-MID #24,541
  • LEN-LONG 8 letters
  • VOW-4 4 vowels
  • CONFUS-LOW 1 pairs
  • VAR-MID 11 variants
  • BOOK-MID 4,417
  • PHOTO-FINISH penance

Nearest frequency peer: penance (-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.

Rank peers near misspelling magnet “peroxide”

Same rarity band: useful when a typo lands on a peer headword

corpus weight

What this shows “peroxide” sits among these FrequencyWords peers; misspelling depth is tracked separately in the edit-distance chart.

Source FrequencyWords open word-frequency list As of September 3, 2026

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

peroxide vs provide
75% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for peroxide
PropertyValue
Headwordperoxide
LanguageEnglish
Part of speechNoun
IPA/pəˈrɒksʌɪd/
Letters8
Frequency rank#24,541
Misspellings tracked11
Confusable pairs1
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “peroxide”

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).peroxidelands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Ticks step logarithmically, so each one marks a roughly tenfold drop in how often the word turns up. Same rarity band neighbours include “penance” (#24,540), “Peugeot” (#24,542), “parentheses” (#24,539). Among 4,417 “P” headwords, “peroxide” is #24,541. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 11 spelling variants around peroxide (IPA /pəˈrɒksʌɪd/), anoun. Corpus frequency is #24,541 among 4,417 “P” headwords. Wiktionary lists 3 senses, so context still picks the gloss.

Our generated misspelling index lists 11 likely wrong-spelling variants for peroxide, with forms such as "eproxide", "peorxide", and "peroixde". 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, "provide", where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: From per- + oxide. The correct English form is peroxide, spelled P-E-R-O-X-I-D-E.

Definition

  1. 1
    A divalent radical or anion containing two oxygen atoms linked by a covalent bond; any substance containing this group yields hydrogen peroxide when treated with an acid.
  2. 2
    Hydrogen peroxide, especially when in an aqueous solution used as a bleach.
  3. 3
    Any compound containing the functional group R-O-O-R'.

Recorded use

Wiktionary examples

These source excerpts show how peroxide appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. Thus far, Dr. Petrakis said, he had found that in women with […] extractable breast fluid, the amount of lipid peroxides in the fluid was on the average seven times higher in Caucasian women than in women of Chinese de[s]cent. In addition, women with cystic breast disease, who face a higher than usual risk of breast cancer, appear to have more peroxides i…
  2. The O–O bond in benzoyl peroxide and the C–N bonds in AIBN homolyze under thermal or photochemical conditions.

Etymology

From per- + oxide.

This word in other languages

peroxyde(Français)Peroxid(Deutsch)

Common misspellings

Also misspelled as:

  • eproxide
  • peorxide
  • peroixde
  • peroxdie
  • peroxidde
  • peroxied
  • peroxxide
  • perroxide
  • perxoide
  • pperoxide
  • preoxide

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of peroxide - 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.

eproxide2peorxide2peroixde2peroxdie2peroxidde1peroxied2peroxxide1perroxide1
Edit distance from "peroxide"

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 "peroxide"?
"peroxide" is spelled P-E-R-O-X-I-D-E. The IPA pronunciation is /pəˈrɒksʌɪd/.
What does "peroxide" mean?
As a noun, "peroxide" means: A divalent radical or anion containing two oxygen atoms linked by a covalent bond; any substance containing this group yields hydrogen peroxide when treated with an acid.
What words are commonly confused with "peroxide"?
"peroxide" is commonly confused with "provide". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "peroxide"?
The IPA (International Phonetic Alphabet) transcription for "peroxide" is /pəˈrɒksʌɪd/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "peroxide"?
From per- + oxide. See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "peroxide", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 8 letters (nearest by frequency rank).

puzzling#24,558reformer#24,566resonant#24,572Rhodesia#24,576

Similar misspelling depth

Headwords with a similar count of attested misspellings (11 here; floor ≥5).

penance11 variantsredneck11 variantsmasking11 variantssizzling11 variants

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list