The phrase "wert on feet" can be interpreted as being active or on the move, so synonyms might include "on the go," "in motion," or "mobile." Other options could be "ambulatory," "peripatetic," or "roaming." The context of the phrase could influence which synonym might be appropriate. For example, if used in a business context, "driven" or "motivated" might be suitable synonyms. Similarly, if discussing a physical activity or sport, "athletic" or "nimble" could work well. Ultimately, the most appropriate synonym will depend on the specific intended meaning, tone, and context.