Here's what rhymes with perfluorooctanoic.

Consider these alternatives

ribonucleic / archaic ascorbic / aortic sorbic / aortic salicylic / acetylsalicylic valproic / heroic trifluoroacetic / magnetic benzoic / heroic hydroxyzine / seen pyruvic / music glutamic / dynamic levothyroxine / thyroxine deoxyribonucleic / archaic pantothenic / academic butyric / isobutyric succinic / scenic