proton
/ˈpɹəʊ.tɒn/
"proton" is a 6-letter English headword indexed on PlainSpell.
The verdict
“proton” is a moderately-common English word, ranked #16,779 in English word frequency and used as a noun.
- #16,779
- frequency rank, English
- 6
- letters
- 9
- tracked misspellings
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A positively charged subatomic particle forming part of the nucleus of an atom and determining the atomic number of an element, composed of two up quarks and a down quark.
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 | proton |
| Language | English |
| Part of speech | Noun |
| IPA | /ˈpɹəʊ.tɒn/ |
| Letters | 6 |
| Frequency rank | #16,779 |
| Misspellings tracked | 9 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Where “proton” sits in English frequency
Spelling & Dictionary Insight
The English entry for proton is 6 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /ˈpɹəʊ.tɒn/. Corpus data places it at rank #16,779 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 proton, with forms such as "porton", "pproton", and "prootn". 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. It also participates in 20 confusable-pair relationships, "Provo", "proven", "Prot", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.
Etymologically, the entry records: Learned borrowing from Ancient Greek πρῶτον (prôton), neuter of πρῶτος (prôtos, “first”). (physics): Coined by New Zealand-British scientist Ernest Rutherford in 1920, in analogy with electron (1891), and with an additional intention of honoring English che… The correct English form is proton, spelled P-R-O-T-O-N.
Definition
- 1A positively charged subatomic particle forming part of the nucleus of an atom and determining the atomic number of an element, composed of two up quarks and a down quark.
- 2A positively charged subatomic particle forming part of the nucleus of an atom and determining the atomic number of an element, composed of two up quarks and a down quark.
- 3Synonym of primordium.
Etymology
Learned borrowing from Ancient Greek πρῶτον (prôton), neuter of πρῶτος (prôtos, “first”). (physics): Coined by New Zealand-British scientist Ernest Rutherford in 1920, in analogy with electron (1891), and with an additional intention of honoring English chemist William Prout. Analyzable as proto- + -on (anatomy): A translation of German Anlage (“fundamental thing”) based on Aristotle’s phrase ἡ πρώτη οὐσία τὸ πρῶτον (hē prṓtē ousía tò prôton).
Synonyms
This word in other languages
Common misspellings
Also misspelled as: porton,pproton,prootn,protno,protonn,protton,prroton,prtoon,rpoton
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of proton - 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
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Using “proton”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is P-R-O-T-O-N - every other letter order is a misspelling in standard orthography.
- Say it as /ˈpɹəʊ.tɒn/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “Provo” - see the side-by-side comparison. proton vs Provo
- 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.