Backslide and Go wrong

Backslide verb - Drop to a lower level, as in one's morals or standards.

Go wrong and backslide are semantically related in relapse topic. In some cases you can use "Go wrong" instead a verb "Backslide".

Go wrong verb - Be unsuccessful.

Backslide and go wrong are semantically related in be unsuccessful topic. Sometimes you can use "Backslide" instead a verb phrase "Go wrong", if it concerns topics such as fail to attain goal.