Here's what rhymes with sadistic.
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flyspeck dipstick diptych picnic lipstick satiric lytic triptych critic civic lyric terrific acidic mimic mythic citric cryptic elliptic idyllic physic rabbinic cynic lithic thymic gimmick pinprick nitpick zoophytic sylphic specific scientific analytic clinic rhythmic hemolytic acrylic ecliptic granitic horrific limbic pacific phenotypic syphilitic arthritic empiric haemolytic saprophytic arrhythmic periwig philippic cenobitic juridic intrinsic apocalyptic catalytic parasitic prolific dendritic paralytic honorific hydrolytic impolitic porphyritic bulimic nephritic bromidic extrinsic monolithic hemispheric hydrophilic proteolytic unscientific antiarrhythmic basophilic metaphysic neolithic thrombolytic unspecific hermaphroditic encephalitic coenobitic nonrhythmic psychoanalytic logarithmic nonspecific algorithmic carboxylic eosinophilic fibrinolytic hieroglyphic organismic antisemitic megalithic patronymic nonscientific palaeolithic paleolithic pantomimic electrolytic cataclysmic stratospheric transpacific polyclinic