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Noun fastness has 3 senses
- speed, swiftness, fastness - a rate (usually rapid) at which something happens; "the project advanced with gratifying speed"
--1 is a kind of pace, rate
--1 has particulars:
- fastness, fixedness, fixity, fixture, secureness - the quality of being fixed in place
--2 is a kind of immovability, immovableness
--2 has particulars: lodgment, lodgement, lodging
- stronghold, fastness - a strongly fortified defensive structure
--3 is a kind of defensive structure, defense, defence
--3 has particulars:
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