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: mode of transportation 
Words: bus, fly, jog, beetle, drive
beetle

Category: food 
Words: meat, weenie, loyalty, frank, vittles
loyalty

Category: emotional status 
Words: happy, merchandise, disappointed, joyful, content

merchandise