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

Synonyms & Similar Words

Relevance

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

Synonyms & Similar Words

Antonyms & Near Antonyms

Example Sentences

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Recent Examples of hard-and-fast This was my hard-and-fast belief — up until the trailer for The Sheep Detectives was released on December 18. —

Fran Hoepfner, Vulture, 18 Dec. 2025 There’s no hard-and-fast rule, and if someone tells you there is? —

Natalie Krebs, Outdoor Life, 28 Aug. 2025 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 See All Example Sentences for hard-and-fast

Recent Examples of Synonyms for hard-and-fast

Adjective

That’s part of the lip-smacking quality of it all — the idea that certain movie characters deserve to have their limbs bitten off.

— Owen Gleiberman, Variety, 11 Apr. 2026
Due to an increase in passenger volume, parking availability may be at or near capacity at certain times throughout the day.

— Staff Report, Hartford Courant, 11 Apr. 2026