This paper reports the preliminary results of a study conducted upon six European languages and started within the framework of the Esprit Project 860 "Linguistic Analysis of the European Languages". A software tool allows to dynamically define the length of endings according to some specified constraint with the purpose of identifying POS cohorts. Some of the statistical results obtained from extensive runs performed upon the given corpora are reported and briefly discussed. The performances of the identified POS cohorts with the respect to a labelling task, have been also assessed and the main outcomes are presented and discussed.