Both nouns and adjectives can be used as an attributive. What's the difference?
a noun can be used before another noun as a attributive, so does a adjective. What's the difference ? Is there anything deverse between "a gold watch" and "a golden watch"? Thanks,guys.

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In my opinion,different words must have different means,even have a bit of, or humanbeing wouldn't had invented them. so I think this two phrases means differently.   
a gold watch means a watch made of gold, focus on its material; 
a golden watch means its color is golden or its material is plated gold.

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in my opinion,different words must have different means,even have a bit of.  or humanbeing would had invented them.   so i think this two phrases means differently. 
a gold watch means a watch made of gold, focus on its material;
a golden watch means its color is golden or its material is plated gold.

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an attributive adjective modifies the noun without using a verb to link them together eg: confused tourist

an attributive noun modifies another noun eg: garlic bread

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It may be a question about compound word rather than a an attributive related question.

Just two nouns are combined to be a new noun in which contains related meaning.

Well, that's just my own opinion.

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Yes, you are correct. Nouns can be used as attributives.
Examples:
apple
apple tree
silver
silver bracelet
yard
yard sale
diamond
diamond ring

There is not a great difference other than a noun may occasionally be used to modify other nouns, and an adjective may occasionally be used as a noun.

Examples:
"The Good, the Bad, and the Ugly"
I enjoy good food.

The adjective "good" can be referred to as a noun, but is primarily used to modify.