environment (n.)

• ambience
• atmosphere
• backdrop
• background
• cincture
• circumstances
• climate
• conditions
• containment
• context
• ecosystem
• embracement
• encirclement
• enclosure
• encompassment
• envelopment
• environs
• habitat
• inclusion
• involvement
• locale
• medium
• milieu
• setting
• situation
• status
• surroundings
• territory