Here's what rhymes with predynastic.
dynastic mastic elastic plastic drastic monastic spastic clastic gymnastic bombastic fantastic inelastic stochastic aplastic periphrastic scholastic neoplastic sarcastic orgiastic nonelastic enthusiastic ecclesiastic hyperplastic hypoplastic iconoclastic thermoplastic viscoelastic interscholastic unenthusiastic overenthusiastic Words that almost rhyme with predynastic
dynamic magic gastric gigantic didactic lactic manic tactic malefic matchstick dramatic automatic classic romantic static fabric panic semantic climatic dogmatic emphatic frantic somatic thematic traumatic erratic pneumatic rheumatic synaptic asthmatic climactic fanatic pedantic phallic prismatic idiomatic italic spermatic tannic titanic bimetallic slapstick traffic diplomatic systematic tragic graphic hepatic metallic problematic aromatic ceramic pragmatic schematic thoracic catholic ecstatic enzymatic lymphatic mechanic nomadic aerodynamic chromatic cinematic galactic kinematic operatic panoramic paradigmatic tympanic magmatic pelagic phlegmatic zygomatic ataxic botanic stigmatic tyrannic baldric priapic democratic organic psychiatric pancreatic symptomatic autocratic barbaric charismatic enigmatic hemorrhagic oceanic pediatric prophylactic prostatic sporadic aliphatic cephalic emblematic geriatric hydrodynamic messianic ophthalmic postsynaptic presynaptic programmatic thalamic achromatic diagrammatic haemorrhagic muriatic satanic syllabic isobaric paediatric schismatic unromantic astigmatic biographic neoclassic plutocratic sycophantic undramatic unemphatic apparatchik unidiomatic aerobatic aristocratic bureaucratic demographic geographic inorganic volcanic asymptomatic metastatic thermodynamic axiomatic galvanic glutamic hemodynamic melodramatic nostalgic psychodynamic psychosomatic anaphylactic diaphragmatic heraldic intrahepatic lithographic orthostatic posttraumatic psychopathic splanchnic technocratic theocratic tomographic unproblematic unsystematic acrobatic chiropractic epigrammatic typographic anticlimactic disyllabic intergalactic meritocratic numismatic panchromatic thermostatic nondramatic photostatic undiplomatic photographic ethnographic hydrostatic idiosyncratic radiographic pornographic stratigraphic telegraphic topographic transatlantic homeostatic iconographic intrathoracic orthographic protoplasmic undemocratic antidemocratic nonmetallic stenographic osteopathic polysyllabic semiautomatic phonographic xerographic seismographic cytoplasmic electrostatic hypothalamic bibliographic endoplasmic monochromatic angiographic cartographic holographic monosyllabic oceanographic autobiographic calligraphic choreographic nondemocratic transoceanic homoeostatic chromatographic crystallographic lexicographic cinematographic electrocardiographic electroencephalographic