Abstract: The Bodos are known by different names in different places. In North Bengal they are known as Mech, in Nepal as Meche, in the Brahmaputra valley of Assam as Boro or Bodo. Racially they are the people of Mongoloid origin and linguistically to the Tibeto-Burman branch of Sino-Tibetan language family. Lexical variations can be observed among the Boro speakers of different geographical areas. As such there are variations in the lexicon among the Boro speakers of North Bengal and Assam. In this paper, a study will be made on the lexicon variation of the Mech dialect of North Bengal and standard dialect of Boro spoken in Assam.