-ologies
Eschatology is the study of end times.
Christian Demonology is the study of demons from a Christian perspective.
Theology Proper or Paterology is the study of God the Father
Christology is the study of God the Son. the Lord Jesus Christ
Pneumatology is the study of God the Holy Spirit
Bibliology is the study of the Bible.
Soteriology is the study of salvation
Ecclesiology is the study of the church.
Angelology is the study of angels.
Christian Anthropology is the study of humanity
Hamartiology is the study of sin