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