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