Two key terms for spiritual entities that are important in Orthodox Christian liturgy are: soul (Greek πνεῦμα pnevma) and spirit (Greek ψυχή psihi).
Biblical Texts
And God said, “Let the water bring forth creeping things of living souls and winged things flying above the land.” (Gen 1:20, LES)
And God formed the human with earth from the land and blew into his face the breath of life, and the human came into being as a living soul. (Gen 2:6, LES)
Righteous souls are in the hand of God… They seem to have died… but they are at peace. (Wisdom 3:1, LES)