καταφορώτατον
κατάφορος, rushing down, tempestuous
Morpho works with a static database. If you like, you can compare the output of Morpheus.
Parsed as:
masculine accusative singular superlative (newmorph18)
neuter accusative singular superlative (newmorph18)
neuter nominative singular superlative (newmorph18)
neuter vocative singular superlative (newmorph18) of
κατάφορος
No checked forms of κατάφορος in the morphology database.