Synonyms of 'epidemic'
widespreadDictionary, wide-ranging, general
The abuse of crack has reached epidemic proportions in the US in recent years.
There is widespread support for the proposals.
a package of wide-ranging economic reforms
Contrary to general opinion, Wiccans are not devil-worshippers.
sweeping economic reforms
individuals who have gone against the prevailing opinion
the rampant corruption of the administration
Smoking is becoming increasingly prevalent among younger women.
Speculation is rife that he'll be sacked.
1 outbreakDictionary, plague, growth
A flu epidemic is sweeping through Britain.
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You can use contagion to refer to the spreading of ideas, or attitudes, or feelings that you consider to be bad or unacceptable from one group of people to another.
He continues to isolate his country from the contagion of foreign ideas.
Thesaurus for epidemic from the Collins English Thesaurus
If there is an epidemic of a particular disease somewhere , it affects a very large number of people there and spreads quickly to other areas.