DELETERIOUS Synonyms: 90 Similar and Opposite Words

Q: How is the word 'deleterious' different from other adjectives like it?

Some common synonyms of deleterious are baneful , detrimental , noxious , and pernicious . While all these words mean "exceedingly harmful," deleterious applies to what has an often unsuspected harmful effect. // a diet found to have deleterious effects

Q: When is 'baneful' a more appropriate choice than 'deleterious'?

The synonyms baneful and deleterious are sometimes interchangeable, but baneful implies injury through poisoning or destroying. // the baneful notion that discipline destroys creativity

Q: When would 'detrimental' be a good substitute for 'deleterious'?

The words detrimental and deleterious are synonyms, but do differ in nuance. Specifically, detrimental implies obvious harmfulness to something specified. // the detrimental effects of excessive drinking

Q: When can 'noxious' be used instead of 'deleterious'?

The meanings of noxious and deleterious largely overlap; however, noxious applies to what is both offensive and injurious to the health of a body or mind. // noxious chemical fumes

Q: Where would 'pernicious' be a reasonable alternative to 'deleterious'?

The words pernicious and deleterious can be used in similar contexts, but pernicious implies irreparable harm done through evil or insidious corrupting or undermining. // the claim that pornography has a pernicious effect on society

deleterious

adjective

ˌde-lə-ˈtir-ē-əs

Definition of deleterious next

as in harmful

causing or capable of causing harm nicotine has long been recognized as a deleterious substance

Synonyms & Similar Words

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How is the word deleterious different from other adjectives like it?

Some common synonyms of deleterious are baneful, detrimental, noxious, and pernicious. While all these words mean "exceedingly harmful," deleterious applies to what has an often unsuspected harmful effect.

a diet found to have deleterious effects

When is baneful a more appropriate choice than deleterious?

The synonyms baneful and deleterious are sometimes interchangeable, but baneful implies injury through poisoning or destroying.

the baneful notion that discipline destroys creativity

When would detrimental be a good substitute for deleterious?

The words detrimental and deleterious are synonyms, but do differ in nuance. Specifically, detrimental implies obvious harmfulness to something specified.

the detrimental effects of excessive drinking

When can noxious be used instead of deleterious?

The meanings of noxious and deleterious largely overlap; however, noxious applies to what is both offensive and injurious to the health of a body or mind.

noxious chemical fumes

Where would pernicious be a reasonable alternative to deleterious?

The words pernicious and deleterious can be used in similar contexts, but pernicious implies irreparable harm done through evil or insidious corrupting or undermining.

the claim that pornography has a pernicious effect on society

Examples Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of deleterious This turned out to be an apt description of public health experts becoming consumed with preventing COVID-19 transmission through lockdown at the expense of other deleterious social effects. —

Cory Franklin, Chicago Tribune, 11 Oct. 2024 Research into long COVID has highlighted the disease’s deleterious effects on the body’s normal functions over time, and some of the same factors may well be at work here. —

Carolyn Barber, Fortune, 11 Oct. 2024 The deleterious impacts of German energy policy on the economy have created dissatisfaction with the political status quo. —

Ariel Cohen, Forbes, 6 Sep. 2024 But there are heroes too — a handful of investigative journalists including Nobel Peace Prize winner Maria Ressa, and Carole Cadwalladr, both of whom have examined the deleterious impact of social media on democratic institutions. —

Matthew Carey, Deadline, 3 Sep. 2024 See all Example Sentences for deleterious

Recent Examples of Synonyms for deleterious

Adjective

Another growing problem is the use of harmful flame retardants in the plastic enclosures around batteries.

Arlene Blum, Forbes, 8 Dec. 2024
While his anti-vaccine views have drawn widespread criticism, his stance on combating chronic disease by ridding the nation’s food supply of harmful chemicals and ingredients broadly aligns with efforts from both sides of the political aisle and has been praised by leading public health experts.

Nik Popli, TIME, 6 Dec. 2024