Katamorphism and Metamorphism

Katamorphism noun - Metamorphism that occurs at or near the earth's surface; breaks down complex minerals into simpler ones.

Metamorphism and katamorphism are semantically related. In some cases you can use "Metamorphism" instead a noun "Katamorphism".

Metamorphism noun - Change in the structure of rock by natural agencies such as pressure or heat or introduction of new chemical substances.

Katamorphism and metamorphism are semantically related. Sometimes you can replace term "Katamorphism" with "Metamorphism", this nouns are similar.