Synonyms of fastness
- 1. speed, swiftness, fastness, pace, rate
- usage: a rate (usually rapid) at which something happens; "the project advanced with gratifying speed"
- 2. fastness, fixedness, fixity, fixture, secureness, immovability, immovableness
- usage: the quality of being fixed in place as by some firm attachment
- 3. stronghold, fastness, defensive structure, defense, defence
- usage: a strongly fortified defensive structure
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Definition and meaning of fastness (Dictionary)