When to use an adjective, a gerund or a noun before a noun?

[vtbreeze]

Hi there! I am not a teacher, I am kinda an student in English.

My question is "When to use an adjective, a gerund or a noun before a noun?". Is there a general rule for the usage of these complementing clauses?

[Rover_KE]

Welcome to the forum, vtbreeze.

You'll have to ask a more specific question. It's not clear what you mean.

Rover

[vtbreeze]

Thanks for your welcoming Rover

May I give you an example. It may sounds not very .... natural but, anyway: What is the correct complementing word to use: educational material, educating material or education material?

[bhaisahab]

Thanks for your welcoming Rover

May I give you an example. It may sounds not very .... natural but, anyway: What is the correct complementing word to use: educational material, educating material or education material?

"educational material"

[Rover_KE]

What is the correct complementing word to use: educational material, educating material or education material?

Right - now I see what you mean.

I'm not sure there's a rule about it.

Rover

[vtbreeze]

Is there a general rule for the use of those words? Eg: Why "wisdom tooth", not "wise tooth", why "electrical appliances", not "electric appliances"? How about eels? "electric eels" or "electrical eels" ? "Educational activities" or "educating activities"?

Please!!!

[Raymott]

Is there a general rule for the use of those words? Eg: Why "wisdom tooth", not "wise tooth", why "electrical appliances", not "electric appliances"? How about eels? "electric eels" or "electrical eels" ? "Educational activities" or "educating activities"?

Please!!!

There's no rule that covers such a wide range of applications.