Bombs vs Device vs Explosive vs Shell

When to use each in English, with meaning, register, and examples.

Bombs

Top 3,000 (common)

Device

Top 1,000 (very common)A2noun

Explosive

Top 2,000 (common)C1adjective

Shell

Top 1,000 (very common)B1noun
 BombsDeviceExplosiveShell
Pronunciation🇬🇧 //bɒmz//🇺🇸 //bɑmz//🇬🇧 /["/dɪˈvaɪs/"]/🇺🇸 /["/dɪˈvaɪs/"]/🇬🇧 /["/ɪkˈspləʊsɪv//ɪkˈspləʊzɪv/"]/🇺🇸 /["/ɪkˈspləʊsɪv//ɪkˈspləʊzɪv/"]/🇬🇧 /["/ʃel/"]/🇺🇸 /["/ʃel/"]/
MeaningExplosive devices that cause destruction.A tool or machine used for a specific purpose.Something that can explode or is very strong and sudden.A hard outer covering of some animals, especially sea creatures.
ExampleThe military dropped bombs on the enemy's base.I use a smartphone as my main device for communication.an **explosive device** *(= a bomb)*The turtle hid inside its shell to protect itself from predators.
RegisterNeutralNeutralNeutralNeutral
How commonTop 3,000 (common)Top 1,000 (very common)Top 2,000 (common)Top 1,000 (very common)
CEFR level-A2C1B1
Part of speechnounadjectivenoun
Collocationsdrop bombs, set off bombs, bomb scare, bomb threat, make a bombclever, ingenious, labour-saving/​labor-saving, be fitted with, have, connect, comprise something, consist of something, be designed to, device for, clever, ingenious, labour-saving/​labor-saving, be fitted with, have, connect, comprise something, consist of something, be designed to, device forbe, highly, be, become, extremely, fairly, veryempty, hard, outer, have, come out of, emerge from, unexploded, spent, anti-aircraft, load, fire, fly, fall, land, fire, shock, case, concrete, burned-out, empty
Antonymspeace, safety, calmdisuse, neglectcalm, peaceful, stablecore, interior, inside
Common mistakesUsing 'bombs' when referring to non-explosive situations, like a bad performance., Confusing 'bomb' with 'bump' in pronunciation., Using 'bombs' in overly casual discussions where a more serious term is needed.Confused with 'devise', which means to create or plan something., Using 'device' as a verb; it is only a noun., Assuming all devices are electronic; can refer to any tool.Confused with 'explodes' as a noun instead of an adjective., Using 'explosive' in situations where 'dramatic' or 'intense' would be more appropriate., Mispronouncing as 'explo-sive' instead of 'ex-ploh-sive'.Confused with 'shelled' when referring to something that has been removed from the shell., Used inappropriately in contexts where 'case' or 'cover' would be more specific., Mispronounced as 'shelle' instead of 'shell'.
Usage notesUse 'bomb' in neutral contexts. Avoid informal or humorous contexts unless intended for effect. Be cautious in sensitive discussions.Used to refer to gadgets or instruments, often in technology. More common in tech contexts. Avoid in very casual settings where simpler terms (like 'thing') might be used.Often used in contexts related to chemistry, military, or describing intense emotions. Avoid in casual conversation unless referring to a specific event.Used to refer to physical shells of animals like snails and turtles or as a protective cover for eggs. Not usually used in formal writing about technology unless specifying a computer shell.

See it in real clips

Bombs
Explosive

Frequently asked questions: Bombs vs Device vs Explosive vs Shell

What's the difference between Bombs, Device, Explosive, and Shell?

Bombs: Explosive devices that cause destruction. Device: A tool or machine used for a specific purpose. Explosive: Something that can explode or is very strong and sudden. Shell: A hard outer covering of some animals, especially sea creatures.

Which is more advanced: Bombs, Device, Explosive, and Shell?

Explosive is the highest level, at C1, on the CEFR scale.

Can you show an example of each?

Bombs: The military dropped bombs on the enemy's base. Device: I use a smartphone as my main device for communication. Explosive: an **explosive device** *(= a bomb)* Shell: The turtle hid inside its shell to protect itself from predators.

Can I use Bombs, Device, Explosive, and Shell interchangeably?

Not always. Bombs, Device, Explosive, and Shell are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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