WordNet sense 1 (treat with excessive indulgence):

baby, coddle, cosset, indulge, mollycoddle, pamper, cocker, featherbed

WordNet sense 2 (hinder or prevent (the efforts, plans, or desires) of):

baffle, bilk, cross, foil, frustrate, scotch, thwart

WordNet sense 3 (make a mess of, destroy or ruin):

blow, bobble, bollix, botch, bumble, bungle, flub, fluff, fumble, mishandle, screw up, bodge, bollix up, bollocks up, botch up, louse up, muck up

WordNet sense 4 (have a strong desire or urge to do something):

itch

WordNet sense 5 (destroy and strip of its possession):

despoil, plunder, violate

WordNet sense 6 (the act of spoiling something by causing damage to it):

spoilage, spoiling

WordNet sense 7 (the act of stripping and taking by force):

despoilment, despoliation, spoliation, despoilation, spoilation

WordNet sense 8 (make imperfect):

deflower, impair, mar, vitiate

WordNet sense 9 (become unfit for consumption or use):

go bad

WordNet sense 10 (alter from the original):

corrupt