OMINOUS Synonyms: 85 Similar and Opposite Words

Q: How does the adjective 'ominous' differ from other similar words?

The words fateful and portentous are common synonyms of ominous . While all three words mean "having a menacing or threatening aspect," ominous implies having a menacing, alarming character foreshadowing evil or disaster. // ominous rumblings from the volcano

Q: Where would 'fateful' be a reasonable alternative to 'ominous'?

The words fateful and ominous can be used in similar contexts, but fateful suggests being of momentous or decisive importance. // the fateful conference that led to war

Q: When can 'portentous' be used instead of 'ominous'?

Although the words portentous and ominous have much in common, portentous suggests being frighteningly big or impressive but now seldom definitely connotes forewarning of calamity. // an eerie and portentous stillness

ominous

adjective

ˈä-mə-nəs

Definition of ominous next

as in sinister

being or showing a sign of evil or calamity to come that comment about downsizing from the company president sounded ominous

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How does the adjective ominous differ from other similar words?

The words fateful and portentous are common synonyms of ominous. While all three words mean "having a menacing or threatening aspect," ominous implies having a menacing, alarming character foreshadowing evil or disaster.

ominous rumblings from the volcano

Where would fateful be a reasonable alternative to ominous?

The words fateful and ominous can be used in similar contexts, but fateful suggests being of momentous or decisive importance.

the fateful conference that led to war

When can portentous be used instead of ominous?

Although the words portentous and ominous have much in common, portentous suggests being frighteningly big or impressive but now seldom definitely connotes forewarning of calamity.

an eerie and portentous stillness

Example 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 ominous Everything about the camp, with its beige corridors and scuffed canteen, is familiar and nondescript, said Alissa Wilkinson in The New York Times, but writer-director Charlie Polinger knows how to make the everyday ominous. —

The Week Uk, TheWeek, 23 Apr. 2026 That fear was compounded by an ominous email that LaSota sent to the entire CFAR mailing list ahead of the reunion. —

Tessa Stuart, Rolling Stone, 23 Apr. 2026 The team’s form looks ominous for Bayern after losing just once across all competitions this season, a league defeat in November at Real Sociedad. —

ABC News, 23 Apr. 2026 Bacon said some of the departures might have to do with an ominous feeling within the ranks. —

Justin Papp, CNBC, 23 Apr. 2026 See All Example Sentences for ominous

Recent Examples of Synonyms for ominous

Adjective

Upending age-old narrative traditions, Paul’s heroism takes a sinister turn when Herbert reveals that the Bene Gesserit, an Illuminati-like secretive order of psychic matriarchs, has long been conditioning the Fremen to expect the arrival of a messiah, or mahdi, in their native tongue.

— Big Think, Big Think, 29 Apr. 2026
This advertised butt jokes, campy fight montages and sinister Seth Rogen laughs.

— Clare Mulroy, USA Today, 28 Apr. 2026