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: kitchenware 
Words: glass, colander, dish, plate, panel
panel

Category: animal 
Words: walk, flap, fish, fly, bats
flap

Category: shady activities 
Words: replace, smear, fudge, unlicensed, tart

tart