Chain reaction and Vicious cycle

Chain reaction noun - A series of chemical reactions in which the product of one is a reactant in the next.

Vicious cycle and chain reaction are semantically related In some cases you can use "Vicious cycle" instead a noun phrase "Chain reaction".

Vicious cycle noun - One trouble leads to another that aggravates the first.

Chain reaction and vicious cycle are semantically related in endless loop topic. You can use "Chain reaction" instead a noun phrase "Vicious cycle".