disease (part of speech: noun)
disorder, ague, handicap, complication, condition, spasm, nausea, infliction, symptom, affection, virus, apoplexy, complaint, sickness, breakdown, syndrome, bug, illness, queasiness, ailment, indisposition, attack, malaise, curse, unhealthiness, disease, fever, debility, sickliness, disability, malady, collapse, infection, pestilence, infirmity, feverishness
feebleness (part of speech: noun)
- But old as he was there were no signs of decrepitude. - "The Coming of the King", James Hocking.
- He then began to watch for signs of decrepitude in the General. - "Her Weight in Gold", George Barr McCutcheon.
- It was a strange spectacle to see this being, so full of vital energy, mobile and restless as a serpent, condemned to that helpless decrepitude, chained to the uneasy seat, not as in the resigned and passive imbecility of extreme age, but rather as one whom in the prime of life the rack has broken, leaving the limbs inert, the mind active, the form as one dead, the heart with superabundant vigour,- a cripple's impotence and a Titan's will! - "Lucretia, Complete", Edward Bulwer-Lytton.