epidemic

nouns

a widespread outbreak of an infectious disease; many people are infected at the same time
is a type of (narrower)
a sudden violent spontaneous occurrence (usually of some undesirable condition)
"the outbreak of hostilities"

adjectives

(especially of medicine) of disease or anything resembling a disease; attacking or affecting many individuals in a community or a population simultaneously
"an epidemic outbreak of influenza"
antonym
antonym
is similar to
(of plants) epidemic among plants of a single kind especially over a wide area
"an epiphytotic blight of potatoes"; "epiphytotic conditions associated with a single-plant agriculture"
is similar to
(of animals) epidemic among animals of a single kind within a particular region
"an epizootic disease"
is similar to
epidemic over a wide geographical area
"a pandemic outbreak of malaria"
is similar to
likely to spread and cause an epidemic disease
"a pestilential malignancy in the air"- Jonathan Swift; "plaguey fevers"
domain category
the branches of medical science that deal with nonsurgical techniques