Which to use
“altho” is a conjunction and “auth” is a noun - they look or sound alike but fill different roles in a sentence.
- #44,055
- “altho” frequency rank
- #30,696
- “auth” frequency rank
- 74751
- confusion score
Side-by-Side Comparison
| Feature | altho | auth |
|---|---|---|
| Definition | Alternative spelling of although. | Abbreviation of authentication. |
Letter map: altho vs auth
Shared letters muted; letters that set altho and auth apart highlighted. Shared run: 3.
Role in the sentence - altho and auth
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: altho is aconjunction and authanoun. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 74751, derived from the frequency rank of both members and their visual similarity.
altho is recorded at frequency rank #44,055, classified as aconj. auth is at rank #30,696, tagged as anoun.
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 74751, this pair ranks #35,315 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of altho vs auth
Shared letters: aht. Private to "altho": lo. Private to "auth": u.
"altho" · 5 letters · shape VCCCV · "auth" · 4 letters · shape VVCC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "altho" for "auth" ever safe?
Which is more common, "altho" or "auth"?
Useful next steps
You've compared "altho" and "auth". Here's where to go from here.
- Full dictionary entry for "altho" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "auth" - compare definitions side by side with the headword page. Word entry
- This pair ranks #35,315 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "altho" and "auth" also get mixed up with nearby pairs, the highest-scored neighbour is "algo vs altho". 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 #35,315 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.