"Angels" seems to be a generic word covering all the host of heaven.
ISBE
6. Relation to Seraphim and Other Angels
Ezekiel's cherubim are clearly related to the seraphim in Isaiah's inaugural vision (
Isa_6:1-13). Like the cherubim, the seraphim are the attendants on God as He is seated upon a throne high and exalted; they are also winged creatures: with twain they cover their faces, and with twain they cover their feet, and with twain they fly. Like the Levites in the sanctuary below, they sing a hymn of adoration: "Holy, holy, holy, is Yahweh of hosts: the whole earth is full of his glory." In the Book of Enoch, the cherubim, seraphim, and ophannim (wheels), and all the angels of power constitute the "host of God," the guardians of His throne, the singers of praise ascribing blessedness to "the Lord of Spirits," with the archangel Gabriel at their head (see 20:7; 40;
Isa_61:10 f; 71:7). And so in the Jewish daily liturgy the seraphim, ophannim, and "living creatures" constitute the heavenly choir who, the elect ministers of the Living God, ready to do the will of their maker with trembling, intone in sweet harmony the Thrice-holy. In the Talmud, the cherubim are represented as having the likeness of youths (with a fanciful etymology, כּטרוּב, ke plus rūbh, "like a youth"; Ṣukk 5b; Ḥag 13b), while, according to the Midrash, they have no definite shape, but appear indifferently as men or women, or as spirits and angelic beings (Gen rabbā) 21).