Synonyms of illnesses

illnesses

noun

plural of illness

as in diseases

an abnormal state that disrupts a plant's or animal's normal bodily functioning

suffered from a mysterious illness that left her weak and tired all the time

Synonyms & Similar Words

• diseases
• ailments
• sicknesses
• ills
• fevers
• conditions
• disorders
• infections
• maladies
• attacks
• bugs
• complications
• infirmities
• ails
• distempers
• troubles
• complaints
• plagues
• distemperatures
• affections
• contagious diseases
• contagions
• weaknesses
• debilities
• bouts
• epidemics
• malaises
• spells
• pests
• matters
• pestilences
• contagia
• decrepitudes
• fits
• pips

Example Sentences

Recent Examples of illnesses

Those with heart disease and respiratory illnesses, young children and older adults are more at risk. — Lauren Penington, Denver Post, 5 July 2026

Researchers know deaths and illnesses rise during heat waves, but the numbers are hard to track, because there aren't uniform requirements. — Dinah Voyles Pulver, USA Today, 3 July 2026

Although there were no official national mortality records in 1776, historians agree that the following illnesses were responsible for the largest number of deaths. — Melissa Rudy, FOXNews.com, 3 July 2026

In rare cases, the infection may produce more severe illnesses such as arterial infections, endocarditis and arthritis, the agency added. — Summer Lin, Los Angeles Times, 2 July 2026

Cruise ships are required to report GI illnesses to the CDC as soon as possible in order to detect outbreaks quickly and prevent them from spreading, the agency states. — Colson Thayer, PEOPLE, 2 July 2026

Oura rings are beloved for their ability to track steps, monitor sleep, and even catch illnesses before symptoms begin. — Genevieve Cepeda, InStyle, 27 June 2026

Prolonged exposure to extreme heat can cause illnesses like heat exhaustion, heat cramps, and the most serious type, heat stroke, according to the US Centers for Disease Control and Prevention. — Chris Dolce, CNN Money, 26 June 2026

In December 2025, Norwegian tech firm No Isolation introduced the AV1 classroom robot, enabling children with long-term illnesses to attend lessons remotely. — Jijo Malayil, Interesting Engineering, 25 June 2026