HARD-AND-FAST Synonyms: 86 Similar and Opposite Words

hard-and-fast

adjective

ˌhärd-ᵊn-ˈfast

as in certain

having been established and usually not subject to change hard-and-fast rules that governed the corporate environment in those days included strictures regarding office dress that were rigidly enforced

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Antonyms & Near Antonyms

as in unchangeable

not capable of changing or being changed hard-and-fast beliefs that are the rock-solid foundation of their religion

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Antonyms & Near Antonyms

Example Sentences

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Recent Examples of hard-and-fast Final Thoughts Like most decision-making in business, there are no hard-and-fast rules. —

Lisa Zeiderman, Forbes.com, 1 Aug. 2025 Some of this came about due to the emergence of the internet and a hard-and-fast push to boost the conference and interactive space of SXSW. —

Michael Barnes, Austin American Statesman, 30 July 2025 Because no hard-and-fast medical test exists for ME/CFS, the condition is sometimes considered more of a psychological than physical ailment. —

New Atlas, 25 July 2025 One hard-and-fast requirement for playability is at least 16GB of unified RAM. —

Andrew Cunningham, ArsTechnica, 16 July 2025 See All Example Sentences for hard-and-fast

Recent Examples of Synonyms for hard-and-fast

Adjective

That is all but certain to change … unless High Point’s March magic extends to the women’s bracket.

— Steven Louis Goldstein, New York Times, 21 Mar. 2026
However, StyleCaster may receive a commission on orders placed through its retail links, and the retailer may receive certain auditable data for accounting purposes.

— Katie Decker-Jacoby, StyleCaster, 21 Mar. 2026