Remissions rhymes with:
academicians, admissions, commission's, commissions, emissions, intermissions, mission's, missions, omissions, permissions, submissions, transmissions
Remissions sounds like:
ranching, ranging, rangoon's, ranking, rankings, rankins, ransacking, ransom's, ransoms, rearranging, reinking, remaking, reminiscence, reminiscences, reminiscing, renaissance, renaissance's, reneging, renouncing, rensing, ringing, ringneck, rinsing, romancing, rummaging