Which to use
“underlined” and “undermine” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #25,629
- “underlined” frequency rank
- #12,161
- “undermine” frequency rank
- 37790
- confusion score
Side-by-Side Comparison
| Feature | underlined | undermine |
|---|---|---|
| Definition | simple past and past participle of underline | To dig underneath (something), to make a passage for destructive or military purposes; to sap. |
Letter map: underlined vs undermine
Shared letters muted; letters that set underlined and undermine apart highlighted. Shared run: 8.
Corpus notes: underlined and undermine
underlined and undermine are indexed as a confusable English pair. We have no recorded pronunciation or part of speech for both members, so the spelling overlap is what we can show you: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 37790, derived from the frequency rank of both members and their visual similarity.
underlined is recorded at frequency rank #25,629, classified as averb. undermine is at rank #12,161, tagged as averb, pronounced /ˌʌn.dəˈmaɪn/.
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 37790, this pair ranks #291,474 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of underlined vs undermine
Shared letters: deinru. Private to "underlined": l. Private to "undermine": m.
"underlined" · 10 letters · shape VCCVCCVCVC · "undermine" · 9 letters · shape VCCVCCVCV
Known mistypes of this pair
- underlined ← nuderlined · udnerlined · undderlined · undelrined · underilned · underliend · underlinde · underlinedd
- undermine ← nudermine · udnermine · unddermine · undemrine · underimne · undermien · underminne · undermmine
Frequently Asked Questions
Do "underlined" and "undermine" mean the same thing in a sentence?
Which is more common, "underlined" or "undermine"?
What to do next
Pair "underlined" vs "undermine" is on the table, pick a follow-up below.
- Full dictionary entry for "underlined" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "undermine" - compare definitions side by side with the headword page. Word entry
- This pair ranks #291,474 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "underlined" and "undermine" also get mixed up with nearby pairs, the highest-scored neighbour is "underlined vs undersized". 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 #291,474 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.