Answer:The word angel means 'messenger' and describes the occupation of the angels. Archangels are head angels. According to St. Gregory the Great, there are 9 orders of angels, which St. Thomas, in his Summa Theologia, divides into 3 groups:
1. Seraphim, Cherubim, and Thrones;
2. The Dominations, Virtues, and Powers;
3. The Principalities, Archangels, and Angels.
1 Enoch 20 lists the archangels as:
Uriel,
Raphael,
Raguel,
Sariel,
Gabriel,
Remiel
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