On the HSK 6 vocabulary list, at CEFR level C2.

méng ㄇㄥˊ

    • sincere honest genuine

      literary

    • drizzle
    • mist
    • blind
    • dim-sighted
    • to cover
    • ignorant
    • to suffer (misfortune)
    • to receive (a favor)
    • to cheat

mēng ㄇㄥ

    • to deceive
    • to cheat
    • to hoodwink
    • to make a wild guess
    • unconscious

      knocked

    • dazed
    • stunned

Where 蒙 is used

Sources