Invalidism :: Invalidism (n.) The condition of an invalid; sickness; infirmity.
Invalidity :: Invalidity (n.) Want of validity or cogency; want of legal force or efficacy; invalidness; as, the invalidity of an agreement or of a will..
Invalidity :: Invalidity (n.) Want of health; infirmity.
Validity :: Validity (n.) The quality or state of being valid; strength; force; especially, power to convince; justness; soundness; as, the validity of an argument or proof; the validity of an objection..
Validity :: Validity (n.) Legal strength, force, or authority; that quality of a thing which renders it supportable in law, or equity; as, the validity of a will; the validity of a contract, claim, or title..