We investigate inflection structure of a synthetic language using Latin as an
example. We construct a bipartite graph in which one group of vertices
correspond to dictionary headwords and the other group to inflected forms
encountered in a given text. Each inflected form is connected to its
corresponding headword, which in some cases in non-unique. The resulting sparse
graph decomposes into a large number of connected components, to be called word
groups. We then show how the concept of the word group can be used to construct
coverage curves of selected Latin texts.