Synonyms of illnesses

1 Syllable
dose, bug, flu, fit
2 Syllables
unhealth, ailing, breakdown, complaint, virus, attack, ailment, sickness
3 Syllables
affliction, malady, relapse, seizure, prostration, collapse, malaise, disorder, syndrome
4 Syllables
diseasedness, disturbance, infirmity, confinement
5 Syllables
convalescence, indisposition, disability