When describing a punishment or consequence that is more severe, there are a number of synonyms that can be used to convey the idea of something being more penalizing. A few examples include words like "harsher," "more severe," "more serious," "steeper," and "more stringent." Other possibilities might include phrases like "more punitive," "more exacting," or "more rigorous." Regardless of the specific word or phrase chosen, the goal is to convey the idea that the punishment or consequence being discussed is more significant than others that may be available, and that it is intended to have a greater impact on those who are subjected to it.