In the early books of the Old Testament, God is known in the Hebrew as Shaddai which perhaps means fruitfulness, blessing, or strength (might). Other authorities say it is from a word meaning 'mountain'. When prefixed by El it becomes 'El Shaddai' or 'Almighty God'.

"…the Lord appeared to him [Abram], and said, 'I am God Almighty; walk before me and be blameless.'" (Genesis 17:1).

In the later books of the Old Testament the name seems more likely to be related to the word shadad which means to 'destroy' or to 'judge'-to enforce the sentence of the court-and this is how God features in those prophetic writings which are warnings to Israel and the surrounding nations to repent: "Alas for that day! For the day of the Lord is near; it will come like destruction from the Almighty." (Joel 1:15).

In the New Testament the Greek translation similarly means 'all powerful'.

Abraham
Acts of the Apostles
Adam
Adoption
Affliction
Age, Aion
Almighty God
Altar
Amen
Angel
  1. Human angels
  2. "The angels who sinned"
  3. Immortal angels
  4. "Fallen angels"
  5. "Evil angels"
Anger
Anointing
Antichrist
Apocrypha
Apostasy
Apostle
Archangel
Ark
  1. Ark constructed by Noah
  2. Ark of the Covenant
Armageddon
Ascension
Assyria
Astrology
Atonement