sphere

[1]	globe , domain , area , orb , globule , orbit , field , spherule , drop , arena , droplet , bubble
[2]	society , class , level , caste , rank , domain , walk of life , station , stratum , position
[3]	area , sphere of influence , field , province , subject , discipline , range , speciality/(US) specialty , forte , (Colloq) bailiwick , territory , department , thing , bag
[4]	sector
[5]	celestial sphere , empyrean , firmament , heavens , vault of heaven , welkin