When it comes to staying committed and persevering through tough situations, there are plenty of synonyms for the phrase "sticking in there". One could use phrases like "hanging tough", "hunkering down", or "persevering". Other options include "staying the course", "holding steady", or even "seeing it through". Essentially, any phrase that conveys a sense of determination and persistence in the face of adversity can be used as a synonym for "sticking in there". These words and phrases can be useful in motivating oneself or others to push through difficult times, no matter what challenges may arise.