Which to use
“hydraulic” is an adjective and “hydraulics” is a noun - they look or sound alike but fill different roles in a sentence.
- #10,865
- “hydraulic” frequency rank
- #34,528
- “hydraulics” frequency rank
- 45393
- confusion score
Side-by-Side Comparison
| Feature | hydraulic | hydraulics |
|---|---|---|
| Definition | Pertaining to water. | The engineering science that deals with practical applications where liquid is in motion and transmits energy. |
Where the spellings diverge
Shared letters are muted; the letters that actually set hydraulic and hydraulics apart are highlighted. They share 9 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: hydraulic is /haɪˈdɹɒlɪk/ while hydraulics is /haɪˈdɹɒlɪks/. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 extra letter(s) - “hydraulic” sits inside “hydraulics”, and the parts of speech differ too (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 45393, derived from the frequency rank of both members and their visual similarity.
hydraulic is recorded at frequency rank #10,865, classified as anadj, pronounced /haɪˈdɹɒlɪk/. hydraulics is at rank #34,528, tagged as anoun, pronounced /haɪˈdɹɒlɪks/.
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 45393, this pair ranks #221,650 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of hydraulic vs hydraulics
Shared letters: acdhilruy. Private to "hydraulic": -. Private to "hydraulics": s.
"hydraulic" · 9 letters · shape CVCCVVCVC · "hydraulics" · 10 letters · shape CVCCVVCVCC
Known mistypes of this pair
- hydraulic ← hdyraulic · hhydraulic · hydarulic · hyddraulic · hydraluic · hydrauilc · hydraulci · hydraulicc
- hydraulics ← hdyraulics · hhydraulics · hydarulics · hyddraulics · hydraluics · hydrauilcs · hydraulcis · hydrauliccs
Frequency comparison
Frequently Asked Questions
Can "hydraulic" and "hydraulics" be used interchangeably?
Which is more common, "hydraulic" or "hydraulics"?
Remembering hydraulic vs hydraulics
The fastest way to pick the right one every time.
- Check the role first: if you need an adjective, it's “hydraulic”; for a noun, it's “hydraulics”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “hydraulic” entry
- Browse more pairs most likely to be confused. Most confusable