Mammoth Uncensored Word List:
19 words ending with ic, 19 letters long

adrenocorticotropic chronostratigraphic electrophotographic electrothermostatic magnetofluiddynamic magnetohydrodynamic meningoencephalitic nonarteriosclerotic noncrystallographic nonintentionalistic nontraditionalistic parasympathomimetic pericardiacophrenic pharmacotherapeutic postimpressionistic psychopharmacologic sesquipedaliophobic spectrofluorometric spectroheliographic