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Synonyms

heroism

American  
[her-oh-iz-uhm] / ˈhɛr oʊˌɪz əm /

noun

  1. the qualities or attributes of a hero or heroine.

    He showed great heroism in battle.
    Synonyms:
    fortitude, daring, courage, bravery, gallantry, prowess, valor, intrepidity
    Antonyms:
    timidity, cowardice

  2. heroic conduct; courageous action.

    Pat's returning into the burning building was true heroism.
heroism British  
/ ˈhɛrəʊˌɪzəm /

noun

  1. the state or quality of being a hero

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of heroism

1660–70; hero + -ism; compare French héroïsme

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Iskander’s David is a young man whose youthful piety and heroism make him a sympathetic figure, notwithstanding the bag of cold cuts.

From Salon • Mar. 29, 2026

Extremely online observers came up with bizarre metaphors to characterize Anthropic’s heroism and pushed Claude to the top of the app-store charts over the weekend.

From Slate • Mar. 3, 2026

Sustainable gains on law and order are years away at best, despite the heroism of Harfuch’s Untouchables.

From Barron's • Feb. 24, 2026

The group reunited on Saturday and Alex said Lilah would grow up knowing about the men who saved her life and she would never forget their heroism.

From BBC • Jan. 17, 2026

Despite their heroism, the 586th was never on the front lines, as were the two other regiments associated with Marina Raskova—the 586th’s job was always to protect the Soviet forces at the rear.

From "A Thousand Sisters" by Elizabeth Wein

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.