Which to use
“ohm” is a noun and “old” is an adjective - they look or sound alike but fill different roles in a sentence.
- #28,649
- “ohm” frequency rank
- #174
- “old” frequency rank
- 28823
- confusion score
Side-by-Side Comparison
| Feature | ohm | old |
|---|---|---|
| Definition | In the International System of Units, the derived unit of electrical resistance; the electrical resistance of a device across which a potential difference of one volt causes a current of one ampere. | Of an object, concept, relationship, etc., having existed for a relatively long period of time. |
Where the spellings diverge
Shared letters are muted; the letters that actually set ohm and old apart are highlighted. They share 1 letter in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
ohm and old form a confusable pair in the English index, two distinct headwords that are easily confused because they look alike, sound alike, or both. They share most of their letters but differ in 2 positions - close enough that the eye skips over the difference, far enough that meaning fully diverges. Our composite confusion score for this pair is 28823, derived from the frequency rank of both members and their visual similarity.
ohm is recorded at frequency rank #28,649, classified as anoun, pronounced /əʊm/. old is at rank #174, tagged as anadj, pronounced /ˈəʊld/.
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 28823, this pair ranks #368,042 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Frequency comparison
Frequently Asked Questions
Can "ohm" and "old" be used interchangeably?
Remembering ohm vs old
The fastest way to pick the right one every time.
- Check the role first: if you need a noun, it's “ohm”; for an adjective, it's “old”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “ohm” entry
- Browse more pairs most likely to be confused. Most confusable