MORTAL Synonyms: 292 Similar and Opposite Words

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

Some common synonyms of mortal are deadly , fatal , and lethal . While all these words mean "causing or capable of causing death," mortal implies that death has occurred or is inevitable. // a mortal wound

Q: When might 'deadly' be a better fit than 'mortal'?

While in some cases nearly identical to mortal , deadly applies to an established or very likely cause of death. // a deadly disease

Q: When is 'fatal' a more appropriate choice than 'mortal'?

The words fatal and mortal can be used in similar contexts, but fatal stresses the inevitability of what has in fact resulted in death or destruction. // fatal consequences

Q: Where would 'lethal' be a reasonable alternative to 'mortal'?

In some situations, the words lethal and mortal are roughly equivalent. However, lethal applies to something that is bound to cause death or exists for the destruction of life. // lethal gas

mortal 1 of 2

adjective

ˈmȯr-tᵊl

Definition of mortal

as in lethal

likely to cause or capable of causing death a mortal wound

Synonyms & Similar Words

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Antonyms & Near Antonyms

as in deadly

of, relating to, or suggestive of death a wounded soldier writhing in mortal agony

Synonyms & Similar Words

Antonyms & Near Antonyms

as in human

relating to or characteristic of human beings just an ordinary guy with all the usual mortal limitations

Synonyms & Similar Words

Antonyms & Near Antonyms

as in hostile

marked by opposition or ill will have always had a mortal aversion to narcissistic people

Synonyms & Similar Words

Antonyms & Near Antonyms

mortal

2 of 2

noun

as in person

a member of the human race just an ordinary mortal living an ordinary life

Synonyms & Similar Words

Antonyms & Near Antonyms

Synonym Chooser

How does the adjective mortal differ from other similar words?

Some common synonyms of mortal are deadly, fatal, and lethal. While all these words mean "causing or capable of causing death," mortal implies that death has occurred or is inevitable.

a mortal wound

When might deadly be a better fit than mortal?

While in some cases nearly identical to mortal, deadly applies to an established or very likely cause of death.

a deadly disease

When is fatal a more appropriate choice than mortal?

The words fatal and mortal can be used in similar contexts, but fatal stresses the inevitability of what has in fact resulted in death or destruction.

fatal consequences

Where would lethal be a reasonable alternative to mortal?

In some situations, the words lethal and mortal are roughly equivalent. However, lethal applies to something that is bound to cause death or exists for the destruction of life.

lethal gas

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 mortal

Adjective

Read below to check out which wizard, non-magical person or mortal aligns with your zodiac sign. — Lisa Stardust, PEOPLE, 4 Aug. 2026 Crime, filth and a fire suppression system that doesn't work are putting hundreds of residents at mortal risk. — Andy Sheehan, CBS News, 29 July 2026

Noun

For mere mortals seeking adventure, canyoneering offers another way to experience Mount Olympus. — Brittany Anas, Forbes.com, 13 Aug. 2026 In the original series, Stone played a mortal, and Gomez was cast as a wizard-in-training. — Virginia Chamlee, PEOPLE, 13 Aug. 2026 See All Example Sentences for mortal

Recent Examples of Synonyms for mortal

Adjective

Dozens of companies have withdrawn over the past decades due to poor profits, an uncertain business outlook and concerns about harm to their reputations from making arms, especially lethal weapons.

— Mia Osmonbekov, Fortune, 31 Aug. 2026
Airwars is the first to map the damage radius of the strikes in Lamerd and estimate the lethal range of the weapon used.

— Julia Frankel, Los Angeles Times, 31 Aug. 2026

Definition of lethal

Adjective

The death toll from a Russian strike on a warehouse west of Kyiv, the war's deadliest attack so far this year, rose to 38 with four people still missing, Ukrainian President Volodymyr Zelenskyy said on social media Sunday.

— ABC News, ABC News, 30 Aug. 2026
Ukraine launched deadly strikes in recent months on the facilities of Russia’s biggest online retailer, Wildberries, saying the company sells dual-use goods that have aided the Kremlin’s war effort.

— Samya Kullab, Los Angeles Times, 30 Aug. 2026

Definition of deadly

Adjective

Five to six years ago, certainly, people were not thinking about agentic AI systems that can plan and complete multi-step tasks with little to no human intervention.

— Zev Fima, CNBC, 2 Sep. 2026
The former chief futurist at OpenAI predicts that there will inevitably be rogue AI agents operating independently of human control.

— Benjamin Guggenheim, Washington Post, 1 Sep. 2026

Definition of human

Adjective

Kuwait's army said its air defence systems were targeting hostile missile and drone attacks.

— Leonie Kidd, CNBC, 3 Sep. 2026
Some recent laws, including the Safer Skies Act of 2025, grant state and local agencies (though not private-sector entities) greater license to detect and track hostile drones.

— Seth G. Jones, Foreign Affairs, 3 Sep. 2026

Definition of hostile

Noun

Its movements and squeaks change in response to the person interacting with it, giving caregivers another way to reduce distress and encourage engagement.

— Atharva Gosavi, Interesting Engineering, 30 Aug. 2026
Dramatic video showed the rescue of one such person as authorities from Nepal worked to drag the man out of the mud deluge.

— Robert McGreevy, FOXNews.com, 29 Aug. 2026

Definition of person

Adjective

An incident that for others might be fatal—a free fall from a high bridge—affects the coyote for only a brief moment.

— Zach Helfand, New Yorker, 31 Aug. 2026
There is a broad debate over the applicability of PNB to modern anti-trust cases, with many legal scholars finding the application of a random number, without any real analysis of the potential harm a merger might cause, to be a fatal flaw.

— Shubha Ghosh, Fortune, 31 Aug. 2026

Definition of fatal

Adjective

Current policy allows airport facilities to be named only for people who have been dead at least two years and who made significant contributions to the airport authority or aviation in Middle Tennessee.

— Hadley Hitson, USA Today, 28 Aug. 2026
To that end, Chris Diamantopoulos looks like an inspired bit of casting as Mitch McNamara, a government agent who swoops in to examine eight dead Jasons and a ninth the police are holding in an interrogation room.

— Scott Tobias, Vulture, 28 Aug. 2026

Definition of dead

Adjective

And as the backlash to generative AI continues to grow, especially in creative fields, those attempts are bringing in far more negative than positive attention.

— Victor Tangermann, Futurism, 3 Sep. 2026
At least twice each fiscal year, school boards review updated financial projections and classify their districts’ fiscal health as positive, qualified or negative, after which county superintendents review each certification and may downgrade it.

— Chaewon Chung, Sacbee.com, 3 Sep. 2026

Definition of negative

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morsels

mortal

mortalities

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“Mortal.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/mortal. Accessed 5 Sep. 2026.

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Synonyms of mortal

adjective

noun

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