Decayer is a word that signifies something that is deteriorating or breaking down. Some synonyms for the word decayer are to deteriorate, decompose, spoil, disintegrate, degrade, rot, corrode, rust, erode, crumble, break down, and wear away. Each of these words implies a sense of decay or corruptness, whether it is the physical decay of an object or the figurative decay of an idea or ideology. It is important to be familiar with synonyms for the word decayer as it allows for better understanding and communication, helping to choose the right word for the right context and situation.