An ardent practitioner is someone who is passionate and dedicated to their craft. There are many different synonyms for this term that can be used to convey the same meaning. Some of the words that can be substituted for "ardent practitioner" are fervent enthusiast, zealous devotee, dedicated professional, committed artist, enthusiastic practitioner, passionate aficionado, and devoted craftsman. Each of these words has its own nuances, but all share the underlying quality of being deeply committed to a particular practice or profession. No matter which synonym you choose, the message is clear: this person is highly skilled and deeply invested in their work.