Which to use
“undated” is an adjective and “update” is a noun - they look or sound alike but fill different roles in a sentence.
- #27,686
- “undated” frequency rank
- #2,094
- “update” frequency rank
- 29780
- confusion score
Side-by-Side Comparison
| Feature | undated | update |
|---|---|---|
| Definition | Not marked with a date. | An additional piece of information, an addition to existing information. |
Where the eye mixes undated and update
Muted = shared; highlighted = the visual trap. They share 5 letters in sequence.
Why the eye confuses undated with update
These two trip readers on the page rather than in the ear: undated is /ʌnˈdeɪtɪd/ while update is /ˈʌp.deɪt/. 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 (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 29780, derived from the frequency rank of both members and their visual similarity.
undated is recorded at frequency rank #27,686, classified as anadj, pronounced /ʌnˈdeɪtɪd/. update is at rank #2,094, tagged as anoun, pronounced /ˈʌp.deɪt/.
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 29780, this pair ranks #360,076 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of undated vs update
Shared letters: adetu. Private to "undated": n. Private to "update": p.
"undated" · 7 letters · shape VCCVCVC · "update" · 6 letters · shape VCCVCV
Known mistypes of this pair
Frequently Asked Questions
Is swapping "undated" for "update" ever safe?
Frequency check: "undated" vs "update" - which ranks higher?
After this comparison
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "undated" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "update" - compare definitions side by side with the headword page. Word entry
- This pair ranks #360,076 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "undated" and "update" also get mixed up with nearby pairs, the highest-scored neighbour is "undated vs undrafted". 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 #360,076 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.