plague in WordNet English dictionary

1. annoy continually or chronically
   "He is known to harry his staff when he is overworked"; "This man harasses his female co-workers"
   harass  hassle  harry  chivy  chivvy  chevy  chevvy  beset  plague  molest  provoke 
   
2. cause to suffer a blight
   "Too much rain may blight the garden with mold"
   blight  plague 
   

1. a swarm of insects that attack plants
   "a plague of grasshoppers"
   infestation  plague 
   
2. any epidemic disease with a high death rate
   plague  pestilence  pest 
   
3. 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
   plague  pestilence  pest  pestis 
   
4. an annoyance
   "those children are a damn plague"
   plague 
   
5. any large scale calamity (especially when thought to be sent by God)
   plague