Which to use
“altho” is a conjunction and “ATO” is a noun - they look or sound alike but fill different roles in a sentence.
- #44,055
- “altho” frequency rank
- #34,783
- “ATO” frequency rank
- 78838
- confusion score
Side-by-Side Comparison
| Feature | altho | ATO |
|---|---|---|
| Definition | Alternative spelling of although. | Acronym of assisted take-off. |
Letter map: altho vs ATO
Shared letters muted; letters that set altho and ATO apart highlighted. Shared run: 3. altho runs 5 letters (VCCCV) against ATO's 3 (VCV) - the length gap alone is often enough to separate them once you know to check it.
Role in the sentence - altho and ATO
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: altho is aconjunction and ATOanoun. On the page they differ by 2 letter(s) in length. Our composite confusion score for this pair is 78838, derived from the frequency rank of both members and their visual similarity.
altho is recorded at frequency rank #44,055, classified as aconj. ATO is at rank #34,783, 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 78838, this pair ranks #23,655 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of altho vs ATO
Shared letters: aot. Private to "altho": hl. Private to "ATO": -.
"altho" · 5 letters · shape VCCCV · "ATO" · 3 letters · shape VCV
Known mistypes of this pair
- altho ← alhto · alltho · althho · altoh · alttho · atlho · latho
Frequently Asked Questions
Is swapping "altho" for "ATO" ever safe?
Frequency check: "altho" vs "ATO" - which ranks higher?
Useful next steps
Pair "altho" vs "ATO" is on the table, pick a follow-up below.
- Full dictionary entry for "altho" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "ATO" - compare definitions side by side with the headword page. Word entry
- This pair ranks #23,655 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "altho" and "ATO" 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 #23,655 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.