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.

Category: emotional status 
Words: merchandise, angry, ecstatic, content, joyful
merchandise

Category: baby animals 
Words: cub, identity, buck, fawn, kid
identity

Category: window material 
Words: panel, glass, translucent fabric, dish, plastic

dish