While the first (pp. of parāmasati) means "corrupt" "wrong taken" "bad grasped", the second (Sk. paramārtha) means ultimate truth.
There are many really worthless people who think they teach Abhidhamma but actually are not only total deluded by themselves but leading others to grasp everything wrong and lead many toward long time suffering.
Only once again Atma can nothing but warn from any facebook, youtube or what ever so-called Abhidhamma teacher, usually householders or householders in robes.
Neither do Ariyas teach such as "Samadhi" nor do they teach "Abhidhamma". May one be able to stay away from fools since they aren't, the heirs of the Niganthas, able to grasp the sublime Dhamma rightly at all, how ever taught a better.