The phrase "has a stab" is often used to describe someone attempting something for the first time or trying something out of their comfort zone. There are several synonyms that could be used in place of this phrase, such as "takes a shot," "gives it a go," "tries their luck," "makes an attempt," "takes a crack at," or "puts forth an effort." These phrases can add some variety to your writing or conversation while conveying the same meaning in a more creative way. So whether you're encouraging someone to try something new or describing your own attempts at a new challenge, there are plenty of ways to replace the phrase "has a stab" in your language.