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