Adverbs

(r)insanely, crazily, dementedly, madlyin an insane manner“she behaved insanely”, “he behaves crazily when he is off his medication”, “the witch cackled madly”, “screaming dementedly”
(r)madly, insanely, deadly, deucedly, devilishly(used as intensives) excessively“she was madly in love”, “deadly dull”, “deadly earnest”, “deucedly clever”, “insanely jealous”