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The word "heavy-duty" is correct and usable in written English
You can use it to describe something that is designed for a lot of use or is more durable than usual. For example, "This heavy-duty drill is perfect for taking on tough jobs."
Dictionary
Heavy-duty
adjective
Designed to withstand hard usage without breaking.
Exact(32)
Heavy-duty diesel engine.
Heavy-duty vehicle.
Heavy-duty industrial stuff".
Heavy-duty pesticides.
A heavy-duty score.
Forgiveness is a heavy-duty word.
Similar(28)
"It's pretty heavy duty.
A heavy duty workhorse of a truck.
No pricing but expect it in heavy duty laptops soon.
This will require some heavy duty gumption on Larry's part.
This thing is good for heavy duty reading.
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CEO of Professional Science Editing for Scientists @ prosciediting.com