Synonyms for Fitness:

n.

ill health, mental health, state, constitution. qualification, worthiness, ability, suitableness, eligibility, handiness. agreement (noun)
correspondence.
attribute (noun)
fittingness.
condition (noun)
shape.
expedience (noun)
convenience, effectiveness, desirability, suitability, opportunity, timeliness, aptness, propriety, well-timedness, efficiency, advantageousness, expedience.
fitness (noun)
eligibility, good condition, good shape, appropriateness, physical fitness, fittingness, seaworthiness.
good condition (noun)
health, robustness, shape, fettle, trim, kilter, vigor.
health (noun)
hardiness, wholesomeness, health, liveliness, vigor, robustness, haleness, well-being, vitality, salubriousness, energy.
qualification (noun)
suitableness, competence.
suitableness (noun)
worthiness.

Other synonyms:

ill health, kilter, worthiness, fettle. mental health, constitution. state. order. form. appropriateness
expediency.
capacity
adequacy.
competence
qualification.

Usage examples for fitness

  1. She had hovered over him until she had prevailed upon him to join the country church, though his sole fitness for this step, in so far as I could gather, lay in his boyish face and his possession of this divine melody. – Youth and the Bright Medusa by Willa Cather
  2. When the old man stood up the fitness of his sobriquet was apparent. – King Spruce, A Novel by Holman Day
  3. It is not possible to make a great King speak with more dignity than did Rose; nor with more fitness to each person, and upon every subject. – The Memoirs of Louis XIV., Volume 3 And His Court and of The Regency by Duc de Saint-Simon