| robustuous(strong, tough, fit, healthy, well) |
| rosy-cheeked(strong, tough, fit, fresh, well) |
| rough(strong, tough, fit, healthy, well) |
| rugged(adjective, strong, tough, fit, healthy) |
| safe and sound(expression, strong, tough, fit, fresh) |
| sane(adjective, sound, right, fit, healthy) |
| seasoned(strong, fit, healthy, well, robust) |
| shapely(adjective, slim, graceful, slender) |
| sinewy(adjective, strong, tough, fit, healthy) |
| slender(adjective, slim, graceful, shapely) |
| slim(adjective, strong, healthy, well, graceful) |
| snappy(strong, tough, fit, healthy, well) |
| spirited |
| sprightly |
| spry |
| stalwart(adjective, strong, fit, healthy, well) |
| staunch(adjective, strong, fit, healthy, well) |
| stout(adjective, strong, sound, tough, right) |
| strapping(adjective, strong, sound, tough, right) |
| substantial(strong, fit, healthy, well, robust) |