EN
The construction of a thesaurus of kind of words/form class generates a number of special issues which are not covered by professional literature. In a thesaurus, kinds of words need to be classified into hierarchical structures. Generic hierarchies can only be established with the introduction of new general terms of kinds of words. The new terminology is also necessary for the setting up of a new ontology of kind of words/form class. This article deals with the special structure of kind of words, the main steps of its construction, its use and its potential for further development.