ailingvsairlineWhich spelling fits?

Which to use

“ailing” and “airline” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#25,993
“ailing” frequency rank
#6,648
“airline” frequency rank
32641
confusion score

Side-by-Side Comparison

Feature ailing airline
Definition An ailment. A company that flies airplanes to transport people and goods.

Where the eye mixes ailing and airline

Muted = shared; highlighted = the visual trap. They share 5 letters in sequence. ailing runs 6 letters (VVCVCC) against airline's 7 (VVCCVCV) - the length gap alone is often enough to separate them once you know to check it.

6 ch
ailing
7 ch
airline

Why the eye confuses ailing with airline

A purely visual mix-up. ailing (/ˈeɪ.lɪŋ/) and airline (/ˈɛəˌlaɪn/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 32641, derived from the frequency rank of both members and their visual similarity.

ailing is recorded at frequency rank #25,993, classified as anoun, pronounced /ˈeɪ.lɪŋ/. airline is at rank #6,648, tagged as anoun, pronounced /ˈɛəˌlaɪn/.

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 32641, this pair ranks #336,143 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of ailing vs airline

Shared letters: ailn. Private to "ailing": g. Private to "airline": er.

"ailing" · 6 letters · shape VVCVCC  ·  "airline" · 7 letters · shape VVCCVCV

Known mistypes of this pair

  • ailing ← aiilng · ailign · ailingg · ailinng · ailling · ailnig · aliing · ialing
  • airline ← ailrine · airilne · airlien · airlinne · airlline · airlnie · airrline · ariline

Frequently Asked Questions

Do "ailing" and "airline" mean the same thing in a sentence?
No. They are said differently (/ˈeɪ.lɪŋ/ versus /ˈɛəˌlaɪn/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
In ordinary English text, does "ailing" or "airline" show up more?
"airline" is the more common of the two: it sits at frequency rank #6,648 in our English list, against #25,993 for "ailing". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

  • Full dictionary entry for "ailing" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "airline" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #336,143 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "ailing" and "airline" also get mixed up with nearby pairs, the highest-scored neighbour is "ailing vs aline". 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 #336,143 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