Which to use
“ides” is a noun and “ISS” is a name - they look or sound alike but fill different roles in a sentence.
- #44,856
- “ides” frequency rank
- #16,055
- “ISS” frequency rank
- 60911
- confusion score
Side-by-Side Comparison
| Feature | ides | ISS |
|---|---|---|
| Definition | The notional full-moon day of a Roman month, occurring on the 15th day of the four original 31-day months (March, May, Quintilis or July, and October) and on the 13th day of all other months. | Initialism of International Space Station. |
Letter map: ides vs ISS
Shared letters muted; letters that set ides and ISS apart highlighted. Shared run: 2.
Grammar separator: ides vs ISS
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: ides is anoun and ISSaname. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 60911, derived from the frequency rank of both members and their visual similarity.
ides is recorded at frequency rank #44,856, classified as anoun, pronounced /aɪdz/. ISS is at rank #16,055, tagged as aname.
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 60911, this pair ranks #97,433 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of ides vs ISS
Shared letters: is. Private to "ides": de. Private to "ISS": -.
"ides" · 4 letters · shape VCVC · "ISS" · 3 letters · shape VCC
Known mistypes of this pair
- ides ← iddes · idess · idse · ieds
Frequently Asked Questions
Can "ides" and "ISS" be used interchangeably?
In ordinary English text, does "ides" or "ISS" show up more?
What to do next
Done with this confusable. These links stay specific to "ides" and "ISS".
- Full dictionary entry for "ides" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "ISS" - compare definitions side by side with the headword page. Word entry
- This pair ranks #97,433 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "ides" and "ISS" also get mixed up with nearby pairs, the highest-scored neighbour is "ices vs ides". 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 #97,433 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.