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