1) Bitterly 2) Cankeredly 3) Cruelly 4) Despitefully 5) Irritably 6) Malevolently 7) Maliciously 8) Nastily 9) Unkindly 1) Bitterly 2) Cruelly 3) Despitefully 4) Express 5) Horribly 6) Hurtfully 7) In a spiteful manner 8) Malevolently 9) Maliciously 10) Meanly 11) Nastily 12) Offensively 13) Rancorously 14) Unkindly 15) Unpleasantly 16) Viciously 17) With spite 
[adv] - in a spiteful manner
with spite adverb in a spiteful manner; `he answered his accusers spitefully`