atomvsATRWhich spelling fits?

Quick tell: atom is a noun, ATR is an abbrev, so they fill different roles in a sentence.

Which to use

“atom” is a noun and “ATR” is an abbrev - they look or sound alike but fill different roles in a sentence.

#41,200
“atom” frequency rank
#37,441
“ATR” frequency rank
78641
confusion score

Side-by-Side Comparison

Feature atom ATR
Definition Átomo. A Todo Ritmo.

Letter map: atom vs ATR

Shared letters muted; letters that set atom and ATR apart highlighted. Shared run: 2.

4 ch
atom
3 ch
ATR

Role in the sentence - atom and ATR

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: atom is anoun and ATRanabbrev. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 78641, derived from the frequency rank of both members and their visual similarity.

atom is recorded at frequency rank #41,200, classified as anoun, pronounced /ˈɑ.tom/. ATR is at rank #37,441, tagged as anabbrev.

Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.

With a confusion score of 78641, this pair ranks #14,181 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.

Orthographic DNA of atom vs ATR

Shared letters: at. Private to "atom": mo. Private to "ATR": r.

"atom" · 4 letters · shape VCVC  ·  "ATR" · 3 letters · shape VCC

Known mistypes of this pair

  • atomaotm · atmo · atomm · attom · taom

Frequently Asked Questions

Is swapping "atom" for "ATR" ever safe?
No - they are not even the same part of speech. "atom" is a noun and "ATR" an abbrev, so a sentence built for one is usually ungrammatical with the other.
In ordinary Spanish text, does "atom" or "ATR" show up more?
"ATR" is the more common of the two: it sits at frequency rank #37,441 in our Spanish list, against #41,200 for "atom". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Pair "atom" vs "ATR" is on the table, pick a follow-up below.

  • Full dictionary entry for "atom" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "ATR" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #14,181 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "atom" and "ATR" also get mixed up with nearby pairs, the highest-scored neighbour is "atl vs atom". Nearby pair
  • Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes

Confusion rank #14,181 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list