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