ies vs ILS, What's the Difference?

Which to use

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

#45,988
“ies” frequency rank: #39,360
“ILS” frequency rank: 85348
confusion score

Side-by-Side Comparison

Feature	ies	ILS
Definition	plural of i, the name of the letter I.	Initialism of instrument landing system.

Letter map: ies vs ILS

Shared letters muted; letters that set ies and ILS apart highlighted. Shared run: 2. ies (VVC) and ILS (VCC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.

3 ch

ies

3 ch

ILS

Corpus notes: ies and ILS

ies and ILS 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 a single letter - e in “ies” becomes l in “ILS”. Our composite confusion score for this pair is 85348, derived from the frequency rank of both members and their visual similarity.

ies is recorded at frequency rank #45,988, classified as anoun. ILS is at rank #39,360, 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 85348, this pair ranks #10,526 of 530,003 scored English confusable pairs - among the most confusable pairs.

Orthographic DNA of ies vs ILS

Shared letters: is. Private to "ies": e. Private to "ILS": l.

"ies" · 3 letters · shape VVC · "ILS" · 3 letters · shape VCC

Frequently Asked Questions

Do "ies" and "ILS" mean the same thing in a sentence?

No. They differ by a single letter - e in “ies” becomes l in “ILS”, but the dictionary glosses above give them different meanings, so swapping one for the other changes what the sentence says.

In ordinary English text, does "ies" or "ILS" show up more?

"ILS" is the more common of the two: it sits at frequency rank #39,360 in our English list, against #45,988 for "ies". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Done with this confusable. These links stay specific to "ies" and "ILS".

Full dictionary entry for "ies" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "ILS" - compare definitions side by side with the headword page. Word entry
This pair ranks #10,526 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
"ies" and "ILS" also get mixed up with nearby pairs, the highest-scored neighbour is "ies vs ith". Nearby pair

Confusion rank #10,526 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.