Blockader rhymes with:
kader, ader, crader, crusader, evader, fader, grader, hader, haider, invader, kader, lader, mader, nader, nadir, rader, raider, sader, schader, schmader, schrader, seder, shader, shrader, snader, spader, srader, stader, strader, swader, trader, vader, wader
Blockader sounds like:
balestra, balestrieri, balistreri, ballester, balster, belcastro, blacketer, blaster, blister, bluster, blustery, bolster