Why isn’t the Holy Ghost called Lord?

Answer:

He could be.  🙂

God is three in one and each shares the same Divine characteristics.

I do believe that this verse does show that Jesus Christ and the Holy Spirit are both always working together, and that the Spirit is also Lord:  2 Corinthians 3:17  Now the Lord is that Spirit: and where the Spirit of the Lord is, there is liberty.

Good question,
Pastor Brad