There are several synonyms for the term "caves in" that can be used in various contexts, depending on the intended meaning. Some alternatives include "collapses," "gives way," "crumbles," "breaks down," "surrenders," and "concedes." Each of these words can be used to describe a situation where something or someone has given in, submitted, or been overcome by external forces. For instance, a building might collapse under heavy snow, a defeated army might surrender to its enemies, or a person might concede defeat in an argument. Whatever the case, these synonyms offer a range of options for expressing the idea of "caving in" with precision and nuance.