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