Synonyms of pestilential
1 infectiousDictionary • a pestilential disease
infectious • infectious diseases such as measles
catching • There are those who think eczema is catching.
poisonous • All parts of the yew tree are poisonous.
contagious • I felt like I had some contagious disease.
noxious • carbon monoxide and other noxious gases
venomous • The adder is Britain's only venomous snake.
2 deadlyDictionary • the pestilential grey squirrel
deadly • a deadly disease currently affecting dolphins
evil • Few people would not condemn slavery as evil.
destructive • the awesome destructive power of nuclear weapons
harmful • the harmful effects of smoking
detrimental • These foods are considered detrimental to health.
pernicious (formal) • the pernicious effects of alcoholism
ruinous • the ruinous effects of the conflict
deleterious (formal) • Fear of crime is having a deleterious effect on society.
injurious • Stress in itself is not necessarily injurious.
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catchingIf an illness or a disease is catching, it is easily passed on or given to someone else.
• There are those who think eczema is catching.
contagiousA disease that is contagious can be caught by touching people or things that are infected with it. Compare infectious.
• I felt like I had some contagious disease.
deadlyIf something is deadly, it is likely or able to cause someone's death, or has already caused someone's death.
• a deadly disease currently affecting dolphins
Thesaurus for pestilential from the Collins English Thesaurus