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 display 
Words: pester, fawn, suppressed, follow, woods
woods

Category: construction 
Words: windlass, crane, dump truck, pelican, digger
pelican

Category: physical activity 
Words: summer, roll, plummet, fall, exercise

summer