Which to use
“Inca” is a noun and “infra” is an adverb - they look or sound alike but fill different roles in a sentence.
- #28,593
- “Inca” frequency rank
- #32,864
- “infra” frequency rank
- 61457
- confusion score
Side-by-Side Comparison
| Feature | Inca | infra |
|---|---|---|
| Definition | A member of the group of Quechuan peoples of highland Peru who established an empire from northern Ecuador to central Chile before the Spanish conquest. | Discussed later. |
Where the spellings diverge
Shared letters are muted; the letters that actually set Inca and infra apart are highlighted. They share 3 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: Inca is /ˈɪŋkə/ while infra is /ˈɪn.fɹə/. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (noun vs adverb), which is usually the fastest check. Our composite confusion score for this pair is 61457, derived from the frequency rank of both members and their visual similarity.
Inca is recorded at frequency rank #28,593, classified as anoun, pronounced /ˈɪŋkə/. infra is at rank #32,864, tagged as anadv, pronounced /ˈɪn.fɹə/.
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 61457, this pair ranks #94,123 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of Inca vs infra
Shared letters: ain. Private to "Inca": c. Private to "infra": fr.
"Inca" · 4 letters · shape VCCV · "infra" · 5 letters · shape VCCCV
Known mistypes of this pair
Frequency comparison
Frequently Asked Questions
Can "Inca" and "infra" be used interchangeably?
Which is more common, "Inca" or "infra"?
Remembering Inca vs infra
The fastest way to pick the right one every time.
- Check the role first: if you need a noun, it's “Inca”; for an adverb, it's “infra”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “Inca” entry
- Browse more pairs most likely to be confused. Most confusable