צָבָא tsâbâʼ (H6635)

a mass of persons (or figuratively, things), especially reg. organized forwar (an army); by implication, a campaign, literally or figuratively (specifically, hardship, worship)

1) that which goes forth, army, war, warfare, host 1a) army, host 1a1) host (of organised army) 1a2) host (of angels) 1a3) of sun, moon, and stars 1a4) of whole creation 1b) war, warfare, service, go out to war 1c) service

or (feminine) צְבָאָה; from צָבָא (H6633);