Synonyms of infectious

infectious

adjective

in-ˈfek-shəs 

as in spreading

exciting a similar feeling or reaction in others

an infectious giggle that got the whole class laughing

Synonyms & Similar Words

• spreading
• catching
• contagious
• epidemic
• overwhelming
• tangible
• irresistible
• perceptible
• winning
• irresistable
• overpowering
• inviting
• palpable
• endearing
• fetching
• disarming
• winsome

Example Sentences

Recent Examples of infectious

Anyone who visited these locations during the hours listed could have been exposed to measles, which is known to be highly infectious, health officials said. —Michelle Deal-Zimmerman, Baltimore Sun, 20 Mar. 2025

The 19-year-old singer from New York City is already making waves through her infectious music inspired by the silver screen era. —Daniela Avila, People.com, 14 Mar. 2025

These findings also showed that levels of virus stayed high and remained infectious over the full two months of aging. —Brenda Goodman, CNN, 14 Mar. 2025

Scientists have already revived 30,000-year-old viruses from permafrost in Siberia—ones that were still infectious, though only to amoebas. —Scott Travers, Forbes, 16 Mar. 2025