Bombs vs Device vs Shell vs Weapon

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

Bombs

Top 3,000 (common)

Device

Top 1,000 (very common)A2noun

Shell

Top 1,000 (very common)B1noun

Weapon

Top 2,000 (common)B1noun
 BombsDeviceShellWeapon
Pronunciation🇬🇧 //bɒmz//🇺🇸 //bɑmz//🇬🇧 /["/dɪˈvaɪs/"]/🇺🇸 /["/dɪˈvaɪs/"]/🇬🇧 /["/ʃel/"]/🇺🇸 /["/ʃel/"]/🇬🇧 /["/ˈwepən/"]/🇺🇸 /["/ˈwepən/"]/
MeaningExplosive devices that cause destruction.A tool or machine used for a specific purpose.A hard outer covering of some animals, especially sea creatures.An object used to hurt or kill someone.
ExampleThe military dropped bombs on the enemy's base.I use a smartphone as my main device for communication.The turtle hid inside its shell to protect itself from predators.The police found a weapon at the crime scene.
RegisterNeutralNeutralNeutralNeutral
How commonTop 3,000 (common)Top 1,000 (very common)Top 1,000 (very common)Top 2,000 (common)
CEFR level-A2B1B1
Part of speechnounnounnoun
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 forempty, hard, outer, have, come out of, emerge from, unexploded, spent, anti-aircraft, load, fire, fly, fall, land, fire, shock, case, concrete, burned-out, emptydeadly, lethal, potent, be armed with, carry, have, system, technology, cache, weapon against, deadly, lethal, potent, be armed with, carry, have, system, technology, cache, weapon against
Antonymspeace, safety, calmdisuse, neglectcore, interior, insidepeace, harmony
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 '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'.Confused with 'tool' - a weapon is meant to harm, while a tool is for construction or assistance., Often used incorrectly in plural form when referring to weapons in general., Misunderstanding the context - 'weapon' may imply legality in some discussions.
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.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.Use 'weapon' in discussions about violence, military, or law enforcement. It's not typically used in casual conversation, but is relevant in news articles, debates, or academic contexts.

See it in real clips

Bombs
Weapon

Frequently asked questions: Bombs vs Device vs Shell vs Weapon

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

Bombs: Explosive devices that cause destruction. Device: A tool or machine used for a specific purpose. Shell: A hard outer covering of some animals, especially sea creatures. Weapon: An object used to hurt or kill someone.

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. Shell: The turtle hid inside its shell to protect itself from predators. Weapon: The police found a weapon at the crime scene.

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

Not always. Bombs, Device, Shell, and Weapon 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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