1. A method comprising: accessing a record stored in one or more tangible storage media, the record recording a plurality of affinities, an affinity between a first word and a second word describing a quantitative relationship between the first word and the second word; identifying a plurality of clusters of the plurality of words according to the plurality of affinities, a cluster comprising one or more words that are sufficiently affine with each other, a first word sufficiently affine with a second word if the affinity between the first word and the second word satisfies one or more affinity criteria; performing a clustering analysis using the clusters to yield a result; and reporting the result of the clustering analysis.