Nouns

(n)redress, remedy, remediationact of correcting an error or a fault or an evil
(n)remedy, curative, cure, therapeutica medicine or therapy that cures disease or relieve pain

Verbs

(v)rectify, remediate, remedy, repair, amendset straight or right“remedy these deficiencies”, “rectify the inequities in salaries”, “repair an oversight”
(v)remedy, relieveprovide relief for“remedy his illness”