1. (noun) sphere, domain, area, orbit, field, arena
a particular environment or walk of life
Synonyms: study, compass, land, heavens, sphere, demesne, knowledge base, field of study, plain, empyrean, welkin, ambit, sector, range, scope, eye socket, field of operations, country, subject field, reach, flying field, subject area, vault of heaven, celestial sphere, expanse, area, force field, line of business, sphere of influence, theater of operations, battlefield, theatre of operations, orbital cavity, bailiwick, stadium, playing area, field of view, champaign, scene of action, theatre, battleground, airfield, knowledge domain, cranial orbit, world, electron orbit, playing field, theater, discipline, region, firmament, field of operation, field of force, sports stadium, bowl, landing field, subject, domain, field of honor, arena, surface area, domain of a function, field, field of battle, orbit, celestial orbit, athletic field
2. (noun) sphere
any spherically shaped artifact
Synonyms: empyrean, domain, sphere of influence, arena, welkin, area, vault of heaven, celestial sphere, field, orbit, firmament, sector, heavens
3. (noun) sphere, sphere of influence
the geographical area in which one nation is very influential
Synonyms: sphere, empyrean, domain, sphere of influence, arena, welkin, area, vault of heaven, celestial sphere, field, orbit, firmament, sector, heavens
4. (noun) sector, sphere
a particular aspect of life or activity
Synonyms: sphere, empyrean, domain, sphere of influence, arena, welkin, area, vault of heaven, celestial sphere, field, orbit, firmament, sector, heavens
5. (noun) sphere
a solid figure bounded by a spherical surface (including the space it encloses)
Synonyms: empyrean, domain, sphere of influence, arena, welkin, area, vault of heaven, celestial sphere, field, orbit, firmament, sector, heavens
6. (noun) sphere
a three-dimensional closed surface such that every point on the surface is equidistant from the center
Synonyms: empyrean, domain, sphere of influence, arena, welkin, area, vault of heaven, celestial sphere, field, orbit, firmament, sector, heavens
7. (noun) celestial sphere, sphere, empyrean, firmament, heavens, vault of heaven, welkin
the apparent surface of the imaginary sphere on which celestial bodies appear to be projected
Synonyms: sector, firmament, domain, sphere of influence, arena, empyrean, sphere, orbit, vault of heaven, celestial sphere, field, welkin, area, heavens
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Synonyms and Antonyms of sphere 
