The best replacement for creature is anti hero.

The best alternatives to creature are rated as following:
★★★★★  anti hero
★★★★  creatine monohydrate
★★★★  camacho jr
★★★  green magnitude
★★★  creacore
★★★  muscle pharm creatine
★★★  cellmass
★★★  con cret
★★★  concrete creatine
★★★  soundsticks
★★  deathwish
★★  creapure
★★  creature
★★  kre alkalyn
★  musclepharm creatine
★  cell mass
  enchantment
  beast mode

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Speaking about creature, one probably shouldn't forget about best sense of smell.

Other search terms related to creature and their ratings are:
★★★★★ best sense of smell
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creature
anti hero
creatine monohydrate