1. A rate (usually rapid) at which something happens
   - speed, swiftness 
2. The quality of being fixed in place as by some firm attachment
   - fixedness, fixity, fixture, secureness 
3. A strongly fortified defensive structure
   - stronghold

Derived forms: fastnesses

See also: fast, slow

Type of: defence [Brit, Cdn], defense [US], defensive structure, immovability, immovableness, pace, rate

• Rhea americana
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