fastness

1. A rate (usually rapid) at which something happens (synset 105065291)
   "the project advanced with gratifying speed"
   tells us about:

   • fast - acting or moving or capable of acting or moving quickly
   • slow - not moving quickly; taking a comparatively long time
   is a type of: pace, rate - the relative speed of progress or change
   subtypes:

   • haste, hastiness, hurriedness, hurry, precipitation - overly eager speed (and possible carelessness)
   • execution speed - (computer science) the speed with which a computational device can execute instructions; measured in MIPS
   • graduality, gradualness - the quality of being gradual or of coming about by gradual stages
   same as: speed, swiftness
2. The quality of being fixed in place as by some firm attachment (synset 104784337)
   is a type of: immovability, immovableness - not capable of being moved or rearranged
   subtypes: lodgement, lodging, lodgment - the state or quality of being lodged or fixed even temporarily
   same as: fixedness, fixity, fixture, secureness
3. A strongly fortified defensive structure (synset 104348013)
   is a type of: defence, defense, defensive structure - a structure used to defend against attack
   subtypes:

   • bastion, citadel - a stronghold into which people could go for shelter during a battle
   • blockhouse - a stronghold that is reinforced for protection from enemy fire; with apertures for defensive fire
   • hold - a stronghold
   • donjon, dungeon, keep - the main tower within the walls of a medieval castle or fortress
   • redoubt - an entrenched stronghold or refuge
   same as: stronghold

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