Problematical is a synonym of problematic.
As adjectives the difference between problematic and problematical
is that problematic is posing a problem; difficult to overcome or solve while problematical is doubtful or disputed.
As a noun problematic
is a problem or difficulty in a particular field of study.
problematic
English
Adjective
(head)
posing a problem; difficult to overcome or solve
debatable; open to doubt
unresolved or dubious
doubtful or uncertain in its outcome
Noun
(
en noun)
(chiefly, in the plural) A problem or difficulty in a particular field of study