Secessionist rhymes with:
abortionist, collaborationist, constitutionist, constructionist, expansionist, extortionist, interventionist, nutritionist, percussionist, preservationist, protectionist, receptionist, rejectionist, reservationist, revolutionist, segregationist
Secessionist sounds like:
sanctity, schenectady, schuknecht, semi-height, sense-data, sensed, singed, sinusoid, skinniest, smacked, smashed, smestad, smoggiest, smoked, smoshed, snacked, snagged, sneaked, sneezed, sonesta, soonest, succinct, sumgait, summonsed, suncoast, sunkist, sunnyside, sunset, sunstate, sunsweet, swimsuit