The Collaborative International Dictionary
Cacophonical
Cacophonic \Cac`o*phon"ic\, Cacophonical \Cac`o*phon"ic*al\, Cacophonous \Ca*coph"o*nous\, Cacophonious \Cac`o*pho"ni*ous\, a. Harsh-sounding.
Wiktionary
cacophonical
a. cacophonous; harsh-sounding; unmusical