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