Fast
Fast adjective - Firmly positioned in place and difficult to dislodge.
Usage example: the rusty, old screws are so fast in the fitting that there's no hope of getting them out
Firm is a synonym for fast in fixed topic. In some cases you can use "Firm" instead the word "Fast" as an adjective or an adverb, when it comes to topics like close, quality, stable, continue. popular alternative
Firm
Firm adjective - Firmly positioned in place and difficult to dislodge.
Usage example: was firm in the saddle during the canter
Fast is a synonym for firm in secure topic. You can use "Fast" instead the word "Firm" as an adjective or an adverb, if it concerns topics such as stable, close, quality, property. popular alternative
Mutual synonyms
How words are described
Cite this Source
Firm and Fast. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/fast/firm
Fast & Firm. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/fast/firm>.
Firm or Fast. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/fast/firm.
Google Ngram Viewer shows how "fast" and "firm" have occurred on timeline