Which to use
“radio” and “radium” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #1,059
- “radio” frequency rank
- #37,184
- “radium” frequency rank
- 38243
- confusion score
Side-by-Side Comparison
| Feature | radio | radium |
|---|---|---|
| Definition | The technology that allows for the transmission of sound or other signals by modulation of electromagnetic waves. | The chemical element (symbol Ra) with an atomic number of 88. It is a soft, shiny and silvery radioactive alkaline earth metal. |
Where the spellings diverge
Shared letters are muted; the letters that actually set radio and radium apart are highlighted. They share 4 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
A purely visual mix-up. radio (/ˈɹeɪdiˌəʊ/) and radium (/ˈɹeɪ.dɪ.əm/) 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 38243, derived from the frequency rank of both members and their visual similarity.
radio is recorded at frequency rank #1,059, classified as anoun, pronounced /ˈɹeɪdiˌəʊ/. radium is at rank #37,184, tagged as anoun, pronounced /ˈɹeɪ.dɪ.əm/.
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 38243, this pair ranks #287,651 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of radio vs radium
Shared letters: adir. Private to "radio": o. Private to "radium": mu.
"radio" · 5 letters · shape CVCVV · "radium" · 6 letters · shape CVCVVC
Known mistypes of this pair
Frequency comparison
Frequently Asked Questions
Can "radio" and "radium" be used interchangeably?
Which is more common, "radio" or "radium"?
Remembering radio vs radium
The fastest way to pick the right one every time.
- Read both glosses above and match the meaning you intend, only context separates this pair.
- See each word in full, definition, IPA, etymology and its other confusables. Full “radio” entry
- Browse more pairs most likely to be confused. Most confusable