Corsair rhymes with:
airshare, benware, boleware, boulware, bussiere, choiniere, confrere, dallaire, decaire, deware, gongaware, heidiwear, labossiere, lacoursiere, laferriere, lafreniere, lapierre, lariviere, lettiere, louviere, posterior, riviere, soulliere, valliere
Corsair sounds like:
caracara, caraker, cariker, carjacker, carragher, carreker, carriger, carriker, caseworker, charger, churchgoer, coarser, corker, corkery, corkscrew, corsaro, corser, courser, coworker, cracker, crager, craker, crazier, creager, cregar, creger, cregger, criger, crigger, croaker, crocker, crockery, croker, crooker, crosser, croucher, crouser, crozier, cruger, cruiser, cruser, crusher, curcuru, curiouser, cursor, cursory