Adjectives ending with the letter C are listed in this post.
academic, acoustic, aerobic, aerodynamic, aesthetic, alcoholic, algebraic, allergic, amniotic, anachronistic, anemic, antagonistic, anti-catholic, antidemocratic, anti-semitic, apathetic, apocalyptic, apologetic, aquatic, archaic, arctic, aristocratic, arthritic, arthroscopic, artistic, asia/pacific, athletic, atlantic, atmospheric, atomic, authentic, autocratic, automatic, aztec
balletic, ballistic, baltic, basic, beatific, bucolic, bureaucratic
capitalistic, cardiac, cataclysmic, catalytic, catastrophic, catholic, ceramic, chaotic, characteristic, charismatic, chauvinistic, chic, chronic, cinematic, civic, classic, claustrophobic, comedic, comic, cosmetic, cosmic, cryptic, cubic, cystic
demagogic, democratic, demographic, diagnostic, didactic, diplomatic, domestic, dramatic, drastic, dynamic
eccentric, eclectic, econometric, economic, ecstatic, elastic, electric, electronic, emblematic, empathetic, emphatic, encyclopedic, endemic, energetic, enigmatic, enthusiastic, erotic, erratic, esoteric, ethnic, euphoric, exotic
fanatic, fantastic, fiber-optic, forensic, formulaic, frantic, frenetic, futuristic
gaelic, generic, genetic, geographic, geometric, gigantic, graphic, gymnastic
harmonic, hasidic, hectic, hegemonic, heroic, hispanic, historic, holistic, homophobic, horrific, hydraulic, hydroelectric, hypnotic
iconoclastic, idealistic, idiomatic, idiosyncratic, idiotic, intrinsic, ironic
journalistic
legalistic, lethargic, linguistic
macroeconomic, magic, magnetic, majestic, manic, materialistic, melodic, metallic, meteoric, metric, microscopic, mid-atlantic, mimetic, monochromatic, monolithic, monopolistic, moralistic, mythic
nationalistic, naturalistic, near-panic, neurotic, nomadic, non-alcoholic, non-hispanic, nordic, nostalgic, novelistic
oceanographic, olympic, operatic, opportunistic, optic, optimistic, organic
pacific, panoramic, parasitic, paternalistic, pathetic, patriotic, pediatric, pelvic, periodic, pessimistic, philanthropic, photogenic, photographic, plastic, pluralistic, poetic, politic, pornographic, pragmatic, problematic, prolific, prophetic, prosaic, psychiatric, psychic, psychoanalytic, psychotic, public
quasi-public, quixotic
realistic, rhythmic, robotic, romantic, rustic
sadistic, sarcastic, sardonic, satanic, satiric, scenic, schematic, schizophrenic, scientific, seismic, semi-automatic, semi-public, septic, simplistic, slavic, socialistic, socioeconomic, solomonic, somatic, sonic, sophomoric, soviet-bloc, specific, sporadic, static, strategic, stratospheric, stylistic, symbolic, sympathetic, symptomatic, synthetic, systematic, systemic
terrific, thematic, therapeutic, toxic, tragic, trans-atlantic, trans-pacific, traumatic, triple-c
ultrasonic, unapologetic, uncharacteristic, undemocratic, unenthusiastic, unheroic, unrealistic, unscientific, unsympathetic
vitriolic, volcanic
xenophobic
zapotec
Hope this word list had the adjective that ends in C you were looking for. Additional descriptive words can be found in the other pages on this site.
Asthmatic.
METHODIC
authentic