instruction:
Given a category and a set of five words, find the word from the set that does not belong (i.e. is the least relevant) with the other words in the category. Words are separated by commas.
question:
Category: physical property 
Words: bulky, angular momentum, pasty, fat, big
answer:
big


question:
Category: type of rigidity 
Words: tough, taut, rough, amalgamated, firm
answer:
amalgamated


question:
Category: moral characteristic 
Words: entree, brash, concise, fortitude, frank
answer:

entree