attribute:
capability,
capableness.
cognition:
capability.
inability:
plenty,
success,
strong point,
sufficiency,
enough.
ineffectuality:
ability,
strength,
soundness.
noun:
competency,
suitability,
fitness,
gift,
genius,
competence,
efficaciousness,
efficiency,
potency,
sinew,
potentiality,
adequacy,
power,
bent,
suitableness,
effectiveness,
capacity,
puissance,
flair,
knack,
aptitude,
talent,
endowment,
effectualness.