Here's what rhymes with pessimistic.
mystic cystic sadistic chauvinistic sophistic artistic holistic mechanistic statistic autistic ballistic logistic theistic animistic hedonistic monistic shamanistic surrealistic euphemistic realistic optimistic stylistic unrealistic heuristic humanistic journalistic simplistic dualistic socialistic synergistic atheistic egoistic fatalistic impressionistic juristic legalistic novelistic patristic syllogistic egotistic voyeuristic aphoristic belletristic nepotistic linguistic antagonistic deterministic idealistic nationalistic moralistic opportunistic pluralistic rationalistic ritualistic communistic futuristic pantheistic polycystic positivistic eulogistic expressionistic feudalistic inartistic jingoistic pugilistic casuistic puristic characteristic materialistic monopolistic naturalistic altruistic anachronistic capitalistic narcissistic paternalistic relativistic militaristic monotheistic polytheistic overoptimistic probabilistic imperialistic oligopolistic cannibalistic individualistic uncharacteristic universalistic spiritualistic sociolinguistic Words that almost rhyme with pessimistic
flyspeck mimic mythic lipstick lytic dipstick diptych nitpick critic civic lyric acidic parasitic picnic citric cryptic elliptic granitic paralytic physic satiric syphilitic cynic lithic thymic gimmick triptych zoophytic sylphic specific scientific analytic clinic rhythmic terrific hemolytic acrylic dendritic ecliptic horrific idyllic limbic pacific rabbinic arthritic empiric haemolytic honorific porphyritic arrhythmic nephritic periwig pinprick philippic cenobitic intrinsic apocalyptic catalytic extrinsic phenotypic basophilic hydrolytic impolitic metaphysic neolithic antisemitic patronymic saprophytic pantomimic encephalitic juridic bromidic nonrhythmic monolithic prolific hemispheric hydrophilic proteolytic unscientific antiarrhythmic organismic thrombolytic megalithic unspecific bulimic hermaphroditic coenobitic psychoanalytic logarithmic nonspecific electrolytic algorithmic eosinophilic fibrinolytic hieroglyphic nonscientific palaeolithic paleolithic transpacific polyclinic carboxylic cataclysmic stratospheric