Here's what rhymes with longist.
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leafed reefed beefed leashed seized teased briefed heaved leaved unleashed sheathed wreathed sneezed peeved sieved weaved wheezed reeved thieved sheaved received achieved pleased relieved breathed grieved appeased bereaved cleaved sleeved breezed believed perceived conceived deceived diseased squeezed aggrieved bequeathed retrieved unsheathed reprieved strived debriefed mercerised unperceived unrelieved interleaved undeceived interweaved overachieved displeased preconceived underachieved disbelieved misconceived meet meat neat mete feet reached heat seat sheet beat wheat feat beet cheat heaped peaked peat leaked peeped reaped cheeked leached peeked piqued seeped sneaked teat beached beaked reeked seethed wreaked beeped leeched teethed cheeped sweet treat elite fleet repeat preached receipt greet suite steeped bleached breached impeached shrieked creaked effete sleet bleat cleat reheat unseat freaked offbeat overeat pleat tweaked skeet tweet antiqued creeped sleeked bleeped unmeant street defeat retreat compete st conceit deceit delete replete entreat petite streaked whereat critiqued preheat screeched squeaked thereat unbleached beseeched downbeat helpmeet overheat overreached filliped nutmeat crowfeet complete concrete obsolete secrete backseat deplete preterite forefeet maltreat mistreat parakeet sweetmeat loveseat clubfeet flatfeet parrakeet webfeet splayfeet tranquilest discrete discreet excrete semisweet tenderfeet incomplete indiscreet bittersweet