Terminology structuring has been the subject of much work in the context of terms extracted from corpora: given a set of terms, obtained from an existing resource or extracted from a corpus, it consists in identifying hierarchical (or other types of) relations between these terms. The present work aims at assessing the feasibility of such structuring by studying it on an existing hierarchically structured terminology. The authors’ overall goal is to test various structuring methods proposed in the literature and to check how they fare on this task. The specific goal at the present stage of this work, which they report here, is focussed on lexical methods that match terms on the basis on their content words, taking morphological variants and synonyms into account.