What is another word for coming down with?
Pronunciation: [kˈʌmɪŋ dˈa͡ʊn wɪð] (IPA) 
The phrase "coming down with" typically means that a person is beginning to develop an illness or symptoms associated with it. However, there are plenty of synonyms that can be used in place of this phrase. Some common alternatives include "falling ill," "developing symptoms," "contracting," "coming down," "sickening," "catching," and "getting sick." Other variations include "onset of sickness," "falling prey to," and "succumbing to." Each of these synonyms can be used to convey the sense of an individual beginning to experience an illness or the symptoms associated with it. It's always important to choose the right wording when discussing health and wellness topics.
