isotope
/ˈaɪ.sə.təʊp/
"isotope" is a 7-letter English headword indexed on PlainSpell.
The verdict
“isotope” has 9 generated spelling variants in the English index at frequency #23,875. The variants make it a useful spelling check.
- #23,875
- frequency rank, English
- 17,902
- “I” headwords
- 9
- tracked misspellings
- 1
- confusable pair
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Any of two or more forms of an element where the atoms have the same number of protons, but a different number of neutrons within their nuclei. Thus, isotopes have the same atomic number but a diff...
Corpus desk
Index EN-isotope · isotope · English
isotope · rank #23,875 · 9 variants · 1 confusable
- FREQ-MID #23,875
- LEN-LONG 7 letters
- VOW-4 4 vowels
- CONFUS-LOW 1 pairs
- VAR-MID 9 variants
- BOOK-DENSE 17,902
- PHOTO-FINISH Interpol
Nearest frequency peer: Interpol (-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.
Frequency neighbourhood for “isotope”
Lower corpus rank = more everyday usage (inverted bar length for readability)
- intercontin…
intercontinental
76,129 corpus weight
- interplay
interplay
76,128 corpus weight
- Interpol
Interpol
76,127 corpus weight
- isotope
isotope
76,126 corpus weight
- Israelites
Israelites
76,125 corpus weight
- Jehovah
Jehovah
76,123 corpus weight
What this shows Bars show where “isotope” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.
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 | isotope |
| Language | English |
| Part of speech | Noun |
| IPA | /ˈaɪ.sə.təʊp/ |
| Letters | 7 |
| Frequency rank | #23,875 |
| Misspellings tracked | 9 |
| Confusable pairs | 1 |
| Source | Wiktionary (kaikki.org) |
Where “isotope” sits in English frequency
A misspelling magnet
The generator records 9 spelling variants around isotope (IPA /ˈaɪ.sə.təʊp/), anoun. Corpus frequency is #23,875 among 17,902 “I” headwords. Dominant gloss: "Any of two or more forms of an element where the atoms have the same number of protons, but a different number of neutrons within their nuclei. Thus, isotopes have the same atomic number but a diff...".
Our generated misspelling index lists 9 likely wrong-spelling variants for isotope, with forms such as "iostope", "isootpe", and "isotoep". 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, "isotopic", since the words sound or look close enough that writers reach for the wrong one mid-sentence.
Etymologically, the entry records: From iso- (“equal”) + -tope (“place”), because the different isotopes of an element always occupy the same place in the periodic table. The term was coined by Scottish doctor Margaret Todd in 1909 and first used publicly on February 27, 1913 by English chem… The correct English form is isotope, spelled I-S-O-T-O-P-E.
Definition
- 1Any of two or more forms of an element where the atoms have the same number of protons, but a different number of neutrons within their nuclei. Thus, isotopes have the same atomic number but a different mass number.
Etymology
From iso- (“equal”) + -tope (“place”), because the different isotopes of an element always occupy the same place in the periodic table. The term was coined by Scottish doctor Margaret Todd in 1909 and first used publicly on February 27, 1913 by English chemist Frederick Soddy.
This word in other languages
Common misspellings
Also misspelled as:
- iostope
- isootpe
- isotoep
- isotoppe
- isotpoe
- isottope
- issotope
- istoope
- siotope
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of isotope - 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.
PlainSpell is rendered directly from structured Wiktionary extracts and open word-frequency lists, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 6, 2026. Primary sources: Wiktionary (via kaikki.org) and FrequencyWords.
Frequently Asked Questions
How do you spell "isotope"?
What does "isotope" mean?
What words are commonly confused with "isotope"?
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What is the origin of the word "isotope"?
Is PlainSpell free to use?
Similar English words by spelling shape
Same letter count and similar misspelling depth for "isotope", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 7 letters (nearest by frequency rank).
Similar misspelling depth
Headwords with a similar count of attested misspellings (9 here; floor ≥5).
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.