Chemical action and Intumescence

Chemical action noun - (chemistry) any process determined by the atomic and molecular composition and structure of the substances involved.

Intumescence and chemical action are semantically related. In some cases you can replace term "Intumescence" with "Chemical action", this terms are similar.

Intumescence noun - The increase in volume of certain substances when they are heated (often accompanied by release of water).

Chemical action and intumescence are semantically related. Sometimes you can use "Chemical action" instead a noun "Intumescence".