Other words for strong or vigorous are robust or active.
Robust
Healthy, strong, rugged, vigorous, muscular, athletic, thriving...
"Lusty" typically refers to having strong sexual desires or being full of vigor and energy. It can also imply a robust and healthy physical condition.
healthy, well, strong, robust, sound, fit, flourishing, vigorous
Sturdy, hearty, robust, and countless other synonyms you can search up on google
The word validus in Latin means "strong, vigorous". Of people, it can mean "healthy"; of medicines, "effective".
robust
It means lively, or energetically, someone with vitality and health.
strong
dynamic, dashing, powerful, energetic, athletic, active, driving, zealous, strong, sturdy, spirited, sound, rugged, potent, intense, healthy, effective, forceful
1. full of or characterized by vigor: a vigorous effort.2. strong; active; robust: a vigorous youngster. 3. energetic; forceful: vigorous steps; a vigorous personality.4. powerful in action or effect: vigorous law enforcement.5. growing well, as a plant.