How do you say mammoth in Japanese?
— マンモス

Generic synonyms for mammoth in Japanese
elephant象 (ぞう, zō)
Similar to for mammoth in Japanese
big大きい (おおきい, ōkíi)
large大きい (おおきい) (ōkii)
Derivative terms for mammoth in Japanese
giant巨人 (きょじん, kyojin)