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: activity 
Words: dally, goodbye, fritter, whittle, dumpling
dumpling

Category: baby animals 
Words: buck, bambi, lust, fawn, deer
lust

Category: emotional display 
Words: love, fawn, flatter, deer, cute

deer