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 spellings diverge
Shared letters are muted; the letters that actually set ides and idly apart are highlighted. They share 2 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
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
Frequency comparison
Frequently Asked Questions
Can "ides" and "idly" be used interchangeably?
Which is more common, "ides" or "idly"?
Remembering ides vs idly
The fastest way to pick the right one every time.
- Check the role first: if you need a noun, it's “ides”; for an adverb, it's “idly”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “ides” entry
- Browse more pairs most likely to be confused. Most confusable