Here's what rhymes with iiological.
logical ecological illogical urological biological theological geological neurological analogical teleological zoological dialogical serological horological psychological ideological archaeological pathological chronological morphological ontological mythological phonological astrological etiological philological radiological topological typological archeological ethological speleological physiological technological sociological genealogical immunological meteorological pedagogical ethnological hydrological mineralogical aetiological tautological gynaecological ornithological audiological methodological eschatological histological pharmacological embryological gynecological hematological dermatological haematological epidemiological neuropsychological terminological toxicological musicological phenomenological bacteriological microbiological neurophysiological biotechnological psychophysiological electrophysiological Words that almost rhyme with iiological
tropical prodigal periodical subtropical nontropical astronautical microscopical semitropical conical chronicle comical ironical rhetorical dropsical hospital philosophical economical diabolical historical astronomical paradoxical categorical metaphorical symbolical ahistorical theosophical pocketsful uneconomical unhistorical taxonomical gastronomical prehistorical