oathvsoftWhich spelling fits?

Quick tell: oath is a noun, oft is an adverb, so they fill different roles in a sentence.

Which to use

“oath” is a noun and “oft” is an adverb - they look or sound alike but fill different roles in a sentence.

#7,587
“oath” frequency rank
#21,016
“oft” frequency rank
28603
confusion score

Side-by-Side Comparison

Feature oath oft
Definition A solemn pledge or promise that invokes a deity, a ruler, or another entity (not necessarily present) to attest the truth of a statement or sincerity of one's desire to fulfill a contract or promise. often; frequently; not rarely

Where the eye mixes oath and oft

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

4 ch
oath
3 ch
oft

Look-alike desk: oath vs oft

These two trip readers on the page rather than in the ear: oath is /ˈəʊθ/ while oft is /ɔft/. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (noun vs adverb), which is usually the fastest check. Our composite confusion score for this pair is 28603, derived from the frequency rank of both members and their visual similarity.

oath is recorded at frequency rank #7,587, classified as anoun, pronounced /ˈəʊθ/. oft is at rank #21,016, tagged as anadv, pronounced /ɔft/.

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 28603, this pair ranks #369,755 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of oath vs oft

Shared letters: ot. Private to "oath": ah. Private to "oft": f.

"oath" · 4 letters · shape VVCC  ·  "oft" · 3 letters · shape VCC

Known mistypes of this pair

  • oathaoth · oaht · oathh · oatth · otah

Frequently Asked Questions

Can "oath" and "oft" be used interchangeably?
No - they are not even the same part of speech. "oath" is a noun and "oft" an adverb, so a sentence built for one is usually ungrammatical with the other.
In ordinary English text, does "oath" or "oft" show up more?
"oath" is the more common of the two: it sits at frequency rank #7,587 in our English list, against #21,016 for "oft". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "oath" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "oft" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #369,755 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "oath" and "oft" also get mixed up with nearby pairs, the highest-scored neighbour is "oft vs omi". 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 #369,755 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list