The phrase "and on and on" is often used to describe something that continues endlessly or without interruption. Some synonyms for this phrase include "forever," "endlessly," "incessantly," "uninterruptedly," "perpetually," and "nonstop." These words convey a sense of duration and persistence that can be useful in describing things like ongoing debates, tedious tasks, or monotonous routines. Other synonyms that can be used to describe something continuing indefinitely include "never-ending," "eternal," "unending," and "unceasing." These words can be used to add emphasis to the idea that something is prolonged or ongoing, helping to capture the feeling of being stuck in a never-ending cycle or routine.