behemoth

Noun
  1. Someone or something that is abnormally large and powerful (synset 110148446)
    is a type of: anomaly, unusual person - a person who is unusual
    same as: colossus, giant, goliath, monster
  2. A person of exceptional importance and reputation (synset 109958449)
    is a type of: important person, influential person, personage - a person whose actions and opinions strongly influence the course of events
    same as: colossus, giant, heavyweight, titan

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