Imploded is a word that describes the collapse or disintegration of something inwardly. There are several synonyms for imploded such as collapsed, crumbled, shattered, disintegrated, destruction, cave-in, breakdown, ruin, and crumpled. Each synonym conveys a slightly different nuance of meaning, alluding to the type of implosion or collapse that occurred. For instance, collapsed might suggest that something fell in on itself while shattered might convey the idea of something breaking into many pieces. In short, imploded can be replaced by several other words which will help to add variety and depth to your writing.