Mammoth Uncensored Word List:
43 words ending with ia, 15 letters long

acousticophobia acroparesthesia afibrinogenemia archaeobacteria cacodemonomania cholesterolemia contreltophobia cryoanaesthesia crystallophobia dermatillomania dyschromatopsia dysmorphophobia eleutherophobia erythroleukemia erythromelalgia haemoglobinuria hypercalcinuria hyperlipidaemia hypermagnesemia hypoalbuminemia hypomagnesaemia koumpounophobia luposlipaphobia lymphocytopenia menometorrhagia oligodendroglia ophthalmophobia ophthalmoplegia osphresiophobia ostraconophobia phenylketonuria pleuropneumonia spirochaetaemia stasibasiphobia strephosymbolia syngenesophobia tachyarrhythmia telephonophobia tetraphocomelia thrombocythemia trophochromidia tuberculophobia virginitiphobia