harm,
assault, harass, bother, molest, assail, hit, strike, beat, hurt, damage
antonym: defend
criticize,
argue, confront, pounce on, disagree, lay into, take on, start in, start on
(informal)
antonym: support
infect,
occur, strike, hit, strike down, affect
tackle,
deal with, set to, start on (informal), pile in, turn to