uniqbeg - Man Page

All of the WordNet noun synsets are organized into hierarchies, headed by the unique beginner synset for entity in the file noun.Tops.

{ entity (that which is perceived or known or inferred to have its own 
distinct existence (living or nonliving)) }

The lexicographer files are not included in the WordNet database package.

noun.Tops

unique beginners for nouns

wndb(5), wninput(5), wnintro(7), wngloss(7).