This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. Something that orbits, especially a spacecraft that orbits a planet or moon without landing on it.

n. an object which orbits another, especially a spacecraft that orbits a planet etc. without landing on it

n. man-made equipment that orbits around the earth or the moon

"I stated that the development and production cost of Shuttle C would approach that of Ares V since the orbiter is an expendable vehicle."

equipment   

Space Shuttle   

Sputnik    ballistic capsule    astronomy satellite    weather satellite    space laboratory    space station    meteorological satellite    space vehicle    spy satellite    spacecraft   

spacecraft    lander    flyby    rover