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