In tendai, can the 1st and 5th teachings be called "potentiality" and "possible"?

In tendai, can the 1st (huayen) and 5th (lotus) teachings be called "potentiality" and "possible", respectively? I know the word "potential" from Heidegger's *Being and Time*, who has appeared in comparative studies. The most eye catching phrase, being "my ownmost potentiality for being", that amounting to death therein. By possibility, I just mean the not "necessary" or "actual", in the standard analytic philosophical terms. I won't go into why I might suppose that could be a viable interpretation.