Decrepitation is a term that refers to the process of breaking or crumbling into small fragments with a popping, cracking or snapping sound. There are many other words that can be used in place of decrepitation such as fragmentation, disintegration, crumbling, splintering, shattering, and fracturing. Each of these synonyms has a slightly different connotation and can be applied in different contexts. For example, fragmentation can refer to the process of breaking a larger object into smaller pieces, while shattering implies a sudden and violent destruction, while cracking or splintering can refer to the breaking of rigid materials. Overall, using synonyms can help you avoid repetition and add variety and color to your writing.