Sphere and Spear

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sphere

/sfir/

noun

1. 1.

   a round solid figure, or its surface, with every point on its surface equidistant from its center.

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2. 2.

   an area of activity, interest, or expertise; a section of society or an aspect of life distinguished and unified by a particular characteristic.

   
   

   "political reforms to match those in the economic sphere"

spear

/spir/

noun

1. 1.

   a weapon with a long shaft and a pointed tip, typically of metal, used for thrusting or throwing.

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verb

1. 1.

   pierce or strike with a spear or other pointed object.