"Make up for lost time" is a phrase that is often used to describe the effort one needs to put in to compensate for the opportunities or time they have missed or lost. However, there are several other synonyms to this phrase that can be used interchangeably. Some of these synonyms include "catch up," "regain lost ground," "redeem oneself," "make amends," "bounce back," "reclaim lost time," and "recover lost opportunities." It's important to note that using synonyms adds depth and variety to writing or conversation and makes it more interesting and engaging.