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