Synonyms of nefarious

nefarious

adjective

ni-ˈfer-ē-əs 

as in evil

not conforming to a high moral standard; morally unacceptable

the chaste heroines and nefarious villains of old-time melodramas

Synonyms & Similar Words

• evil
• unlawful
• immoral
• sinful
• vicious
• vile
• dark
• bad
• wicked
• villainous
• infamous
• rotten
• unethical
• corrupt
• wrong
• obscene
• iniquitous
• unsavory
• illegal
• unauthorized
• cruel
• improper
• offensive
• ugly
• unrighteous
• dirty
• nasty
• cursed
• sordid
• disreputable
• contemptible
• despicable
• ignoble
• infernal
• prohibited
• condemned
• naughty
• pernicious
• depraved
• forbidden
• reprehensible
• dishonest
• objectionable
• perverted
• atrocious
• unscrupulous
• ill
• noxious
• mean
• sick
• snide
• ungodly
• evil-minded
• unwholesome
• debauched
• unhealthy
• incorrect
• base
• censurable
• pestilential
• dissolute
• degenerate
• debased
• blameworthy
• scrofulous
• fallen
• libertine
• unseemly
• unprincipled
• loose
• proscribed
• blamable
• miserable
• outlawed
• wretched
• unclean
• execrable
• barred
• dishonorable
• low-minded
• indecent
• discouraged
• errant
• low
• vulgar
• lousy
• reprobate
• disallowed
• unbecoming
• indecorous
• curst
• erring
• cussed
• banned
• interdicted
• defiling

Antonyms & Near Antonyms

• moral
• legitimate
• good
• ethical
• honorable
• noble
• virtuous
• right
• legal
• righteous
• decent
• sublime
• high
• honest
• lofty
• scrupulous
• just
• reputable
• permissible
• upright
• permitted
• elevated
• principled
• authorized
• licensed
• endorsed
• proper
• approved
• high-minded
• sanctioned
• correct
• promoted
• allowed
• decent
• supported
• exemplary
• clean
• innocent
• pure
• perfect
• seemly
• white
• decorous
• law-abiding
• commendable
• creditable
• wholesome
• encouraged
• worthy
• blameless
• guiltless
• unobjectionable
• abetted
• venerable
• immaculate
• inoffensive
• incorruptible
• irreproachable
• indorsed
• spotless
• esteemed
• chaste
• uncorrupted
• respected
• unerring
• squeaky-clean
• lily-white
• unfallen
• upstanding

Synonym Chooser

How does the adjective nefarious differ from other similar words?

Some common synonyms of nefarious are corrupt, degenerate, iniquitous, vicious, and villainous. While all these words mean "highly reprehensible or offensive in character, nature, or conduct," nefarious suggests flagrant breaching of time-honored laws and traditions of conduct.

the nefarious rackets of organized crime

Where would corrupt be a reasonable alternative to nefarious?

While in some cases nearly identical to nefarious, corrupt stresses a loss of moral integrity or probity causing betrayal of principle or sworn obligations.

city hall was rife with corrupt politicians

When could degenerate be used to replace nefarious?

In some situations, the words degenerate and nefarious are roughly equivalent. However, degenerate suggests having sunk to an especially vicious or enervated condition.

a degenerate regime propped up by foreign powers

When can iniquitous be used instead of nefarious?

The words iniquitous and nefarious are synonyms, but do differ in nuance. Specifically, iniquitous implies absence of all signs of justice or fairness.

an iniquitous system of taxation

When might vicious be a better fit than nefarious?

The meanings of vicious and nefarious largely overlap; however, vicious may directly oppose virtuous in implying moral depravity, or may connote malignancy, cruelty, or destructive violence.

a vicious gangster

When would villainous be a good substitute for nefarious?

While the synonyms villainous and nefarious are close in meaning, villainous applies to any evil, depraved, or vile conduct or characteristic.

a villainous assault

Example Sentences

Recent Examples of nefarious

In the film, Louis-Dreyfus’ villainous character has positioned a number of MCU loners and rejects to kill each other for her own nefarious reasons. —Pamela McClintock, HollywoodReporter, 4 May 2025

In the clip, Eva pleads with her mother to scrap the nefarious plot, only prompting Leslie to dig her heels into even firmer soil. —Ryan Coleman, EW.com, 30 Apr. 2025

Louis-Dreyfus’ villainous character has positioned a number of MCU loners and rejects to kill each other for her own nefarious reasons. —Pamela McClintock, HollywoodReporter, 29 Apr. 2025

As many high-profile hacks and data leaks have shown, private data can easily be mishandled and exploited for nefarious purposes. —Corey G. Johnson, ProPublica, 29 Apr. 2025

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