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: military rank 
Words: regular, major, general, soldier, cadet
regular

Category: guitar part 
Words: fret, worried, chord, notes, headstock
worried

Category: shady activities 
Words: falsehood, lie, wrongful, cookies, fudge

cookies