atom

/ˈætəm/

//ˈætəm// noun

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

"atom" is a 4-letter English headword indexed on PlainSpell.

The verdict

“atom” has 5 generated spelling variants in the English index at frequency #10,813. The variants make it a useful spelling check.

#10,813
frequency rank, English
3,931
“A” headwords
5
tracked misspellings
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The smallest possible amount of matter which still retains its identity as a chemical element, now known to consist of a nucleus surrounded by electrons.

Corpus desk

Index EN-atom · atom · English

atom · rank #10,813 · 5 variants · 20 confusables

  • FREQ-MID #10,813
  • LEN-MID 4 letters
  • VOW-2 2 vowels
  • CONFUS-HIGH 20 pairs
  • VAR-MID 5 variants
  • BOOK-MID 3,931
  • PHOTO-FINISH Ashton

Nearest frequency peer: Ashton (-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 “atom”

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

corpus weight

What this shows “atom” 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).

atom vs ATP
0% similar
atom vs att
50% similar
atom vs ATV
0% similar

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

Key facts for atom
PropertyValue
Headwordatom
LanguageEnglish
Part of speechNoun
IPA/ˈætəm/
Letters4
Frequency rank#10,813
Misspellings tracked5
Confusable pairs20
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “atom”

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right).atomlands here:

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

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “Ashton” (#10,812), “auburn” (#10,814), “awakening” (#10,815). Among 3,931 “A” headwords, “atom” is #10,813. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 5 spelling variants around atom (IPA /ˈætəm/), anoun. Corpus frequency is #10,813 among 3,931 “A” headwords. Wiktionary lists 12 senses, so context still picks the gloss.

Our generated misspelling index lists 5 likely wrong-spelling variants for atom, with forms such as "aotm", "atmo", and "atomm". 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 20 confusable-pair relationships, "ATP", "att", "ATV", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.

Etymologically, the entry records: From Middle English attome, from Middle French athome, from Latin atomus (“smallest particle”), from Ancient Greek ἄτομος (átomos, “indivisible”), from ἀ- (a-, “not”) + τέμνω (témnō, “to cut”, o-grade in τομ-) + -ος (-os). Atoms are so named because they we… The correct English form is atom, spelled A-T-O-M.

Definition

  1. 1
    The smallest possible amount of matter which still retains its identity as a chemical element, now known to consist of a nucleus surrounded by electrons.
  2. 2
    A hypothetical particle posited by Greek philosophers as an ultimate and indivisible component of matter.
  3. 3
    The smallest, indivisible constituent part or unit of something.
  4. 4
    In logical atomism, a fundamental fact that cannot be further broken down.
  5. 5
    The smallest medieval unit of time, equal to fifteen ninety-fourths of a second.
  6. 6
    A mote of dust in a sunbeam.
  7. 7
    A very small amount; a whit.
  8. 8
    An individual number or symbol, as opposed to a list; a scalar value.
  9. 9
    An integer representing a particular string.
  10. 10
    A non-zero member of a partially ordered set that has only zero below it (assuming that the poset has a least element, its "zero").
  11. 11
    An element of a set that is not itself a set; an urelement.
  12. 12
    An age group division in hockey for nine- to eleven-year-olds.

Recorded use

Wiktionary examples

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

  1. Oxygen levels on Earth skyrocketed 2.4 billion years ago, when cyanobacteria evolved photosynthesis: the ability to convert water and carbon dioxide into carbohydrates and waste oxygen using solar energy. The evolutionary precursor of photosynthesis is still under debate, and a new study sheds light. The critical component of the photosynthetic system is…
  2. Towards the following morning, the thermometer fell to 5°; and at daylight, there was not an atom of water to be seen in any direction.

Etymology

From Middle English attome, from Middle French athome, from Latin atomus (“smallest particle”), from Ancient Greek ἄτομος (átomos, “indivisible”), from ἀ- (a-, “not”) + τέμνω (témnō, “to cut”, o-grade in τομ-) + -ος (-os). Atoms are so named because they were historically thought up as to be the smallest unit of matter, and thus indivisible. Doublet of atomus.

This word in other languages

átomo(Español)atome(Français)Atom(Deutsch)átomo(Português)

Common misspellings

Also misspelled as:

  • aotm
  • atmo
  • atomm
  • attom
  • taom

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of atom - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.

aotm2atmo2atomm1attom1taom2
Edit distance from "atom"

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 "atom"?
"atom" is spelled A-T-O-M. The IPA pronunciation is /ˈætəm/.
What does "atom" mean?
As a noun, "atom" means: The smallest possible amount of matter which still retains its identity as a chemical element, now known to consist of a nucleus surrounded by electrons.
What words are commonly confused with "atom"?
"atom" is commonly confused with "ATP", "att", "ATV". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "atom"?
The IPA (International Phonetic Alphabet) transcription for "atom" is /ˈætəm/. 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 "atom"?
From Middle English attome, from Middle French athome, from Latin atomus (“smallest particle”), from Ancient Greek ἄτομος (átomos, “indivisible”), from ἀ- (a-, “not”) + τέμνω (témnō, “to cut”, o-grade in τομ-) + -ος (-os). Atoms are so named becau... 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 "atom", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 4 letters (nearest by frequency rank).

ants#10,807vine#10,792vest#10,791hulk#10,864

Similar misspelling depth

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

Jeep5 variantsknot5 variantslust5 variantsmayo5 variants

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

Source: FrequencyWords open word-frequency list