Here's what rhymes with preliminiary.
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belly allele jelly deli telly smelly underbelly vermicelli ready rarely levy levee leggy recce many heavy fairly barely semi lengthy petty penny fleshy heady messy jetty teddy bevy breathy dressy faery jenny thready kepi lefty sedgy veggie already healthy steady plenty wealthy deadly freshly gentry frenzy antennae carefree medley sentry sexy sketchy sweaty unfairly vestry belfry deathly fleshly gayety hefty machete pebbly tempi testy trendy marquetry pesky wetly twenty friendly scarcely gently intensely epilepsy immensely unhealthy densely intently squarely deftly excellency unsteady coquetry stealthy sullenly confetti fidgety tensely aplenty libretti maidenly effendi ineptly preciously directly especially assembly correctly elementary indirectly incorrectly unfriendly spaghetti halfpenny hostelry sacredly adeptly woodenly expressly apoplexy grotesquely complexly narcolepsy baronetcy catalepsy deviancy reassembly penitently complementary confusedly equivalently ambivalently cognoscenti circumspectly