There are several synonyms for the phrase "take rap for", which means to accept responsibility or be blamed for something. An alternative phrase could be "bear the brunt of" or "shoulder the blame". Another possible synonym could be "accept the consequences of", as in taking responsibility for one's actions. "Own up to" or "fess up to" could also be used, implying a willingness to admit to wrongdoing. Other options could include "suffer the consequences of", "accept the fall for", or "receive the blame for". Overall, there are various ways to convey the idea of taking responsibility or being blamed for something, depending on the context and tone of the situation.