Which to use
“ides” is a noun and “idly” is an adverb - they look or sound alike but fill different roles in a sentence.
- #44,856
- “ides” frequency rank
- #31,612
- “idly” frequency rank
- 76468
- confusion score
Side-by-Side Comparison
| Feature | ides | idly |
|---|---|---|
| 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. | Without specific purpose, intent or effort. |
Where the eye mixes ides and idly
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. ides (VCVC) and idly (VCCV) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Look-alike desk: ides vs idly
These two trip readers on the page rather than in the ear: ides is /aɪdz/ while idly is /ˈaɪd(ə)lɪ/. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (noun vs adverb), which is usually the fastest check. Our composite confusion score for this pair is 76468, 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/. idly is at rank #31,612, tagged as anadv, pronounced /ˈaɪd(ə)lɪ/.
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 76468, this pair ranks #30,029 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of ides vs idly
Shared letters: di. Private to "ides": es. Private to "idly": ly.
"ides" · 4 letters · shape VCVC · "idly" · 4 letters · shape VCCV
Known mistypes of this pair
Frequently Asked Questions
Do "ides" and "idly" mean the same thing in a sentence?
Frequency check: "ides" vs "idly" - which ranks higher?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "ides" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "idly" - compare definitions side by side with the headword page. Word entry
- This pair ranks #30,029 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "ides" and "idly" 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 #30,029 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.