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