Which to use
“thirsty” is an adjective and “thirty” is a num - they look or sound alike but fill different roles in a sentence.
- #10,623
- “thirsty” frequency rank
- #3,791
- “thirty” frequency rank
- 14414
- confusion score
Side-by-Side Comparison
| Feature | thirsty | thirty |
|---|---|---|
| Definition | Needing to drink water or any liquid that can supply water. | The cardinal number occurring after twenty-nine and before thirty-one, represented in Arabic numerals as 30. |
Where the spellings diverge
Shared letters are muted; the letters that actually set thirsty and thirty apart are highlighted. They share 6 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: thirsty is /ˈθɝs.ti/ while thirty is /ˈθɜːti/. 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 (adjective vs num), which is usually the fastest check. Our composite confusion score for this pair is 14414, derived from the frequency rank of both members and their visual similarity.
thirsty is recorded at frequency rank #10,623, classified as anadj, pronounced /ˈθɝs.ti/. thirty is at rank #3,791, tagged as anum, pronounced /ˈθɜːti/.
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 14414, this pair ranks #470,189 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of thirsty vs thirty
Shared letters: hirty. Private to "thirsty": s. Private to "thirty": -.
"thirsty" · 7 letters · shape CCVCCCV · "thirty" · 6 letters · shape CCVCCV
Known mistypes of this pair
Frequency comparison
Frequently Asked Questions
Can "thirsty" and "thirty" be used interchangeably?
Which is more common, "thirsty" or "thirty"?
Remembering thirsty vs thirty
The fastest way to pick the right one every time.
- Check the role first: if you need an adjective, it's “thirsty”; for a num, it's “thirty”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “thirsty” entry
- Browse more pairs most likely to be confused. Most confusable