pests

'pests'

[plague.n.01] as in: a serious (sometimes fatal) infection of rodents caused by Yersinia pestis and accidentally transmitted to humans by the bite of a flea that has bitten an infected animal

'pests'

[plague.n.02] as in: any epidemic disease with a high death rate

'pests'

[pest.n.03] as in: a persistently annoying person

'pests'

[pest.n.04] as in: any unwanted and destructive insect or other animal that attacks food or crops or livestock etc.

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Examples:
he sprayed the garden to get rid of pests
many pests have developed resistance to the common pesticides