Freediving is a thrilling sport that involves diving deep underwater without the aid of any breathing equipment. For those who are familiar with this activity, you will be glad to know that there are many synonyms for freediving that can be used interchangeably. Some of the common alternatives for freediving include breath-hold diving, skin diving, apnea diving, and deep diving. Other phrases that can be used to describe this amazing sport include underwater diving, hyperbaric swimming, and breath-hold diving, among others. Whether you are an experienced freediver or an aspiring one, it is always fascinating to learn about different words to use when referring to your favorite hobby or sport.