Bristle
WordNet
noun
(1) A stiff hair
(2) A stiff fiber (coarse hair or filament); natural or synthetic
verb
(3) React in an offended or angry manner
"He bristled at her suggestion that he should teach her how to use the program"
(4) Rise up as in fear
"The dog's fur bristled"
"It was a sight to make one's hair uprise!"
(5) Be in a state of movement or action
"The room abounded with screaming children"
"The garden bristled with toddlers"