What is another word for lung-busting?
Pronunciation: [lˈʌŋbˈʌstɪŋ] (IPA) 
If you're looking to describe an activity that is strenuous, intense, and takes your breath away, there are plenty of synonyms for the term "lung-busting." An alternative could be "grueling," which suggests a long and challenging ordeal. If you're looking for something more visceral, "gut-wrenching" evokes the physical pain and discomfort that often accompanies a difficult activity. Alternatively, you could use "exhausting" or "taxing" to describe something that takes a lot of energy and effort. Other options include "unrelenting," "punishing," or "strenuous." No matter how you choose to describe a challenging activity, there's sure to be a synonym that fits your needs.
