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