| sinewy(adjective, strong, tough, fit, healthy) |
| stalwart(adjective, strong, tough, fit, lively) |
| staple |
| stout(adjective, strong, tough, fit, vigorous) |
| tireless(adjective, strong, moving, energetic, lively) |
| underlying(adjective, important, significant, original, essential) |
| viable(adjective, animate, life, living, conscious) |
| vibrant(adjective, complete, solid, energetic, powerful) |
| breathing(adjective, active, animate, living, alive) |
| constitutional(adjective, body, material, important, significant) |
| eager(adjective, energetic, ready, active, awake) |
| effervescent(adjective, enthusiastic, vivacious) |
| mandatory(adjective, set, significant, essential, basic) |
| merry |
| mighty(adjective, strong) |
| obligatory(adjective, important, significant, essential, critical) |
| quick(adjective, pleasant, energetic, lively, ready) |
| rejuvenating |
| salubrious(adjective, healthy) |
| springy |