There is a Greek word relating to apostasy. This is the definition I am interested it. WT can call anyone and everyone an apostate, but technically it is someone who falls from truth, not someone who never had it (fake/fraud).
You are an apostate from WT/JW, not from biblical Christianity (you were likely never a Christian, just a cultist, pseudo-christian). So, you are not an apostate by Pentecostal standards, just JW ones (and they are wrong; Mormons also call fallen members apostates, but that would not be a JW equivalent unless JWs add to the proper definition and say all non-JWs are apostates; this is circular and assumes that Christendom, etc. has fallen from Christianity and that JWs are the only expression of Christianity, which is patently false in light of their lack of any historical roots in Church history before Russell).