He's a robot vs Machine

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

He's a robot

Top 5,000 (fairly common)

Machine

Top 1,000 (very common)A1noun
Most common: Machine
 He's a robotMachine
Pronunciation🇬🇧 //hiːz ə ˈrəʊbɒt//🇺🇸 //hiz ə ˈroʊbɑt//🇬🇧 /["/məˈʃiːn/"]/🇺🇸 /["/məˈʃiːn/"]/
MeaningA machine that can move and do tasks like a person.A machine is a device that uses energy to do work or perform a task.
ExampleIn the movie, he's a robot who helps humans solve problems.The machine was broken, so we couldn't finish our work.
RegisterNeutralNeutral
How commonTop 5,000 (fairly common)Top 1,000 (very common)
CEFR level-A1
Part of speechnoun
Collocationsbeep like a robot, robot voice, robot technologygiant, great, huge, operate, run, use, go, work, break down, operator, parts, tool, by machine, in a/​the machine, on a/​the machine, a make of machine, party, political, marketing, politician, politics, a cog in the machine, a well-oiled machine
Antonyms-human, organism
Common mistakesMisunderstanding 'robot' as only an artificial intelligence, not just machines., Confusing 'robot' with 'android' which refers specifically to human-like robots., Using 'he's' instead of 'it's' when the robot's gender is not specified.Confusing 'machine' with 'mechanism'—a mechanism is a part of a machine., Using 'machine' to refer to non-mechanical items like software., Overgeneralizing 'machine' to include tools that don't use power.
Usage notesCommonly used in casual conversation, science fiction, or discussions about technology. Avoid in formal contexts unless discussing robotics.Use 'machine' for mechanical devices like cars or computers. Avoid using it for living beings or to describe simple tools.

See it in real clips

He's a robot
Machine

Frequently asked questions: He's a robot vs Machine

What's the difference between He's a robot and Machine?

He's a robot: A machine that can move and do tasks like a person. Machine: A machine is a device that uses energy to do work or perform a task.

Which is more common: He's a robot and Machine?

Machine is the most common in everyday English.

Can you show an example of each?

He's a robot: In the movie, he's a robot who helps humans solve problems. Machine: The machine was broken, so we couldn't finish our work.

Can I use He's a robot and Machine interchangeably?

Not always. He's a robot and Machine 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.