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