Potassium and Potassium hydroxide

Potassium noun - A light soft silver-white metallic element of the alkali metal group; oxidizes rapidly in air and reacts violently with water; is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvite.

Potassium hydroxide and potassium are semantically related. In some cases you can use "Potassium hydroxide" instead a noun "Potassium".

Potassium hydroxide noun - A potassium compound often used in agriculture and industry.

Potassium and potassium hydroxide are semantically related. You can use "Potassium" instead a noun phrase "Potassium hydroxide".