Ag and Noble metal

Ag noun - A soft white precious univalent metallic element having the highest electrical and thermal conductivity of any metal; occurs in argentite and in free form; used in coins and jewelry and tableware and photography.

Noble metal and ag are semantically related. In some cases you can use "Noble metal" instead a noun "Ag".

Noble metal noun - Any metal that is resistant to corrosion or oxidation.

Ag and noble metal are semantically related. Sometimes you can replace term "Ag" with "Noble metal", this terms are similar.