allovsalthoConfusable pair

Quick tell: allo is a adjective, altho is a conjunction, so they fill different roles in a sentence.

Which to use

“allo” is an adjective and “altho” is a conjunction - they look or sound alike but fill different roles in a sentence.

#40,110
“allo” frequency rank
#44,055
“altho” frequency rank
84165
confusion score

Side-by-Side Comparison

Feature allo altho
Definition Allosexual and/or alloromantic; experiencing sexual and/or romantic attraction. Alternative spelling of although.

Letter map: allo vs altho

Shared letters muted; letters that set allo and altho apart highlighted. Shared run: 3.

4 ch
allo
5 ch
altho

Part-of-speech tell for allo / altho

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: allo is anadjective and althoaconjunction. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 84165, derived from the frequency rank of both members and their visual similarity.

allo is recorded at frequency rank #40,110, classified as anadj, pronounced /ˈæ.ləʊ/. altho is at rank #44,055, tagged as aconj.

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 84165, this pair ranks #12,535 of 530,003 scored English confusable pairs - among the most confusable pairs.

Orthographic DNA of allo vs altho

Shared letters: alo. Private to "allo": -. Private to "altho": ht.

"allo" · 4 letters · shape VCCV  ·  "altho" · 5 letters · shape VCCCV

Known mistypes of this pair

  • alloalo · alol · lalo
  • althoalhto · alltho · althho · altoh · alttho · atlho · latho

Frequently Asked Questions

Can "allo" and "altho" be used interchangeably?
No - they are not even the same part of speech. "allo" is an adjective and "altho" a conjunction, so a sentence built for one is usually ungrammatical with the other.
In ordinary English text, does "allo" or "altho" show up more?
"allo" is the more common of the two: it sits at frequency rank #40,110 in our English list, against #44,055 for "altho". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Pair "allo" vs "altho" is on the table, pick a follow-up below.

  • Full dictionary entry for "allo" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "altho" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #12,535 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "allo" and "altho" 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 #12,535 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