Based on the outputs obtained from the diverse set of words, it appears that f(x) might be selective for abstract concepts and institutions. Let's try to summarize the findings.

[DESCRIPTION]: The function f(x) seems to quantify the association of inputs with abstract concepts and institutions. A higher output value indicates a stronger association. Examples of concepts and institutions that f(x) might be selective for include "university", "freedom", "library", "emotion", and "happiness". The function is less sensitive to concrete objects or entities like "cat", "chocolate", "mountain", or "music".