WordRel.com

• a strongly fortified defensive structure

  synonym	stronghold
  hypernym	defencedefensedefensive structure
  hyponym	bastionblockhousecitadeldonjondungeonholdkeepredoubt

• a rate (usually rapid) at which something happens

  synonym	speedswiftness
  derivation	fastfastfast
  attribute	fastslow
  hypernym	pacerate
  hyponym	execution speedgradualitygradualnesshastehastinesshurriednesshurryprecipitation

• the quality of being fixed in place as by some firm attachment

  synonym	fixednessfixityfixturesecureness
  derivation	fast
  hypernym	immovabilityimmovableness
  hyponym	lodgementlodginglodgment