Thus, you do not agree with Sola Scriptura. The theological belief of the Trinity was developed with the aid of Tradition in the Catholic Church. It's not defined in Scripture, though present. To define it involved the weighing of traditional acceptance that such a thing (the triune God) was a reality, in spite of no explicit Biblical evidence of triunity (three persons, yes, but not triunity). Same goes for the divine/human nature of Christ. Not explicit, but defined later, with the aid of Church Tradition.
That is irrelevent to my point.
You reject the concept of the rapture because the word is not in the Bible.
I pointed out that the word trinity is not in the Bible, either.
Neither words are in the Bible, but I believe in them both.
And the Trinity is screamingly obvious in the term "Father, Son and Holy Ghost." The Trinity is in the Bible, but the word isn't.