Quick answer: Device is a noun meaning a tool, gadget, or piece of equipment made for a purpose: an electronic device; a safety device. Devise is a verb meaning to plan, invent, or work out a method: They devised a new marketing strategy. Remember: like advICE (noun) and advISE (verb), or practICE and practISE, the -ice spelling is the noun and the -ise spelling is the verb. For a fuller definition, see the Cambridge Dictionary entry for ‘device’.
Comparison Table
| Word | Part of Speech | Meaning | Example |
|---|---|---|---|
| device | noun | a tool, gadget, or piece of equipment made for a specific purpose | Charge your device before the flight. |
| devise | verb | to plan, invent, or work out a method or plan | The team devised a clever solution. |
Using Device (Noun)
Device is a noun referring to any object, tool, or piece of equipment designed and built for a particular purpose — often but not always electronic or mechanical.
Please switch off your electronic device before takeoff.
The smoke alarm is a safety device found in most homes.
She uses several devices throughout the day: a phone, a laptop, and a tablet.
The lock has a tamper-proof device built into it.
Engineers tested the new medical device for safety before release.
Common Collocations with Device
- electronic device / mobile device / handheld device
- safety device / tracking device / listening device
- a device for + gerund (a device for measuring temperature)
Using Devise (Verb)
Devise is a verb meaning to create, plan, or invent something — usually a method, system, plan, or strategy — through careful thought.
The company devised a new marketing strategy to reach younger customers.
Teachers must devise engaging lessons for online learning.
Scientists devised an experiment to test the theory.
She devised a clever way to organise the filing system.
The government is devising new policies to tackle climate change.
Common Collocations with Devise
- devise a plan / devise a strategy / devise a method
- devise a system / devise a solution
- devise ways to + verb
The Classic -ice / -ise Pattern
English has several noun/verb pairs that follow this same spelling logic, where the noun ends in -ice and the related verb ends in -ise (or -ize in American English):
- advICE (noun) / advISE (verb) — "Take my advice" / "I advise you to wait."
- practICE (noun, British English) / practISE (verb, British English) — "Football practice" / "Practise your English every day."
- devICE (noun) / devISE (verb) — "A useful device" / "Devise a plan."
Learning to recognise this -ice (noun) versus -ise (verb) pattern makes spelling far more predictable. Our word-formation guide explores more noun-verb pairs distinguished in exactly this way.
Memory Trick
Remember: C comes before S in the alphabet, just as a noun (deviCe) often comes before its related verb (deviSe) is used. Or simply link device to "C for concrete object" and devise to "S for strategy" — a noun you can hold versus a verb describing mental planning.
Common Mistakes
✗ Charge your devise overnight.
✓ Charge your device overnight.
✗ They need to device a new strategy.
✓ They need to devise a new strategy.
✗ She deviced a clever plan.
✓ She devised a clever plan.
✗ The car has a safety devise built in.
✓ The car has a safety device built in.
Quick Check: Device or Devise?
Four questions — choose the correct word for each sentence.
1. “Please switch off your electronic ___.”
2. “We need to ___ a better plan for next year.”
3. Which word is a noun, not a verb?
4. “Scientists ___ a clever experiment to test the theory.”
Frequently Asked Questions
What is the difference between device and devise?
Device is a noun referring to a tool, gadget, or piece of equipment made for a specific purpose, such as a phone or a safety device. Devise is a verb meaning to plan, invent, or work out a method, such as devising a new strategy. They are pronounced slightly differently (device rhymes with "nice"; devise rhymes with "wise") and belong to different word classes entirely.
Are device and devise pronounced the same?
No, though they look similar in spelling, they are pronounced with a different final consonant sound. Device ends with an "s" sound, like "ice" (deh-VYSS). Devise ends with a "z" sound, like "wise" (deh-VYZ). Listening carefully to this difference can help you tell them apart, in addition to remembering the spelling rule.
How can I remember device vs devise?
Device and devise follow the same pattern as advice/advise and practice/practise: the noun ends in -ice, and the verb ends in -ise. Device (noun, a physical object) ends like "ice" — something solid you can hold. Devise (verb, to plan) ends like "wise" — using your mind wisely to invent a plan.
What are some other noun/verb pairs like device and devise?
English has several pairs following this -ice (noun) / -ise (verb) pattern: advice/advise, practice/practise (in British English), licence/license (in British English), and prophecy/prophesy. Recognising this pattern across multiple word pairs makes it much easier to predict correct spelling in each individual case.
What is the past tense of "devise"?
The past tense and past participle of devise is "devised": "She devised a clever solution to the problem." Do not confuse this with "deviced," which is not a standard English word. Device, being a noun, does not have a past tense form at all, since only verbs conjugate for tense.
Can "device" be used figuratively?
Yes. In literature, a "literary device" refers to a technique used by a writer to create a particular effect, such as metaphor, foreshadowing, or irony: "Repetition is a common literary device in poetry." This figurative use still functions as a noun, just like the concrete, physical sense of device.
What does "devise a plan" mean exactly?
To "devise a plan" means to think carefully and create a new plan, method, or strategy from scratch, often to solve a specific problem: "The committee devised a plan to reduce costs by 20 percent." Devise implies original thinking and careful design, rather than simply following an existing plan.
Is "device" always about technology?
No. While "device" very commonly refers to electronic gadgets like phones and tablets today, the word has a much broader meaning covering any tool or mechanism made for a purpose: a "safety device," a "listening device," or even a "device" in the legal sense (a will can "devise" property, related to the verb form used in legal English).
Is "devise" used in legal English?
Yes, in formal legal contexts, "devise" is also used as a specialised verb (and sometimes noun) meaning to leave real property to someone in a will: "He devised his house to his daughter." This technical legal usage is distinct from the everyday sense of planning or inventing, though it shares the same spelling and root.
Why do learners often confuse device and devise?
The two words differ by only one letter and share a nearly identical pronunciation, making them easy to mix up in both speech and writing. Because "device" (the noun) is far more common in everyday vocabulary through technology, learners often default to it even when the verb "devise" is grammatically required, especially in academic or business writing about plans and strategies.