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