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