"On the go" is a phrase that describes being in motion or constantly active. There are various ways to express this idea using different synonyms. For instance, "active" is a word that is commonly used in lieu of "on the go." "Busy" and "energetic" are also excellent synonyms for this phrase. "Mobile," "fast-paced," and "non-stop" are a few other options. "Dynamic," "vibrant," and "animated" can also convey the notion of being on the go. Ultimately, the word chosen depends on the interpretation and the desired connotation. Whatever word is chosen, it should reflect the sense of movement, urgency, and dynamism that being "on the go" connotes.