To supplement other lists of most useful words based on such criteria as frequency of usage, range, and availability, this listing measures the capacity of 3,000 words of the French vocabulary to define, extend the meaning of, or to replace other words. Descriptions of the measures of definition, inclusion, extension, and combination are followed by explanations of validation rationale, the coverage indexes, and application. A number of supportive graphs and tables precede the actual coverage indexes that comprise the major portion of the document. (AF)