What is another word for up-current?
Pronunciation: [ˌʌpkˈʌɹənt] (IPA) 
"Up-current" is typically used to describe the direction opposite to the flow of water, usually in a river or a stream. If you're looking for some alternative words that can be used in place of "up-current," a few options include "upstream," "against the current," "countercurrent," and "up-river." Each of these words can be used to describe the direction of movement against the flow of water. Depending on the context in which you are using these words, some may be more appropriate than others. Regardless of the term you choose to use, just make sure it accurately describes the direction you wish to convey.
