The paper contains the research of noun-compounds from modern Tibetan corpus with the use of a relational lexical database. The lexical database represents a consistent classification of meanings of Tibetan lexical units with different relations between them. The paper describes the structure of the database; principles of process work with Tibetan compounds; recognized types of compounds semantic structure. For the most part Tibetan compounds belong to grammatical, religious philosophical and general scientific terms. Therefore the paper specifies the processing principles of subject area compounds, including areas, identified by Tibetan linguistic picture of the world.