Which to use
“IAS” is a noun and “is” is a verb - they look or sound alike but fill different roles in a sentence.
- #31,214
- “IAS” frequency rank
- #8
- “is” frequency rank
- 31222
- confusion score
Side-by-Side Comparison
| Feature | IAS | is |
|---|---|---|
| Definition | Initialism of indicated airspeed. | third-person singular simple present indicative of be |
Where the spellings diverge
Shared letters are muted; the letters that actually set IAS and is apart are highlighted. They share 2 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: IAS is anoun and isaverb. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 31222, derived from the frequency rank of both members and their visual similarity.
IAS is recorded at frequency rank #31,214, classified as anoun. is is at rank #8, tagged as averb, pronounced /ɪz/.
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 31222, this pair ranks #347,966 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of IAS vs is
Shared letters: is. Private to "IAS": a. Private to "is": -.
"IAS" · 3 letters · shape VVC · "is" · 2 letters · shape VC
Frequency comparison
Frequently Asked Questions
Can "IAS" and "is" be used interchangeably?
Which is more common, "IAS" or "is"?
Remembering IAS vs is
The fastest way to pick the right one every time.
- Check the role first: if you need a noun, it's “IAS”; for a verb, it's “is”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “IAS” entry
- Browse more pairs most likely to be confused. Most confusable