At end of the day, "label" words like "Justification" are made up. Theologians have written in dozens of languages for thousands of years, and there is no single "correct" set of terms to use when talking about theological ideas.
This is ok! The Bible's words were inspired in their original form by The Holy Spirit, so we can trust those ones to be much more reliable. But All Truth is God's Truth, no matter what terms it is expressed in. Merely human words that try to synthesize and apply biblical truth, like any words humans write without God's special help, are limited and imperfect.
Not everyone separates "Theology" into the same categories I have on the Theology page. That's ok. Not everyone would agree with my super-brief summaries of Calvinism and Protestantism on the Are "Theology" and "Doctrine" different? page. That's also ok. Theology is a merely human endeavor to understand God and his revealed truth more fully. It isn't possible for merely human beings like us to do that perfectly. But it's still worth working on! Imperfect things can still be useful and valuable.
At the end of the day, it is God himself, by The Holy Spirit, who makes it possible for us to understand anything at all. Imperfect words, ideas, and understanding (which we will always have, forever!) aren't enough to stop God from helping us know true truth about him, if that's what he is pleased to do.