sound, wholesome, hale, salubrious, hearty, sensible, able-bodied, reasonable, intelligent, thriving, more...

unhealthy, sickly, ailing, diseased, infirm

fit, well, unfit, unwell, sick, diseased, more...

heart, wise, brain, how, stay, honest, useful, free, bright, rabid, more

in good health,   not sick,   feeling well,   nutritious food,   good for health,   in the best health,   perfectly well,   feeling fine,   is well,   fit enough