There is an abundant amount of scriptural evidence implying that God is a trinity without the word 'trinity'.
These scriptural passages [and plenty more] are not promoted by the WTS.
Off the top of my head
ACTS 5 :3-4 is a proof text. Peter calls the Holy Spirit God. You have lied to the Holy Spirit. You have lied to God he says.
ISAIAH 9 :6 states that Jesus is God. A child is born, a son is given, he is to be called, wonderful councilor, mighty God, eternal father.
Similar to the hell texts. Jesus spoke more of hell then he did of heaven, yet those are scriptural passages the the WTS will play down and in some cases simply deny.
just saying