Top: Similarity aligns with association. Pairs with a small difference in rank between USF (association) and SimLex-999 (similarity) scores for each POS category. Bottom: Similarity contrasts with association. Pairs with a high difference in rank for each POS category. *Note that the distribution of USF association scores on the interval [0,10] is highly skewed towards the lower bound in both SimLex-999 and the USF data set as a whole.