First stab is an idiomatic expression that refers to an initial attempt to solve a problem or do something new. There are many synonyms for this expression, including first attempt, initial effort, preliminary try, opening move, and maiden shot. Other synonyms might include test run, early foray, exploratory mission, or pilot project. Using different phrases can help you to communicate your ideas more effectively, and by choosing the right synonym, you can tailor your expression to precisely convey the message you want to send. Whatever phrase you choose, remember that first stabs are important steps towards achieving success, and all progress is good progress.