orbit vs extent

orbit and extent both are nouns.

Word	Noun	Adjective	Verb	Adverb
orbit	Yes	No	Yes	No
extent	Yes	No	No	No

As nouns, extent is a hypernym of orbit; that is, extent is a word with a broader meaning than orbit:

orbit (noun)	extent (noun)
an area in which something acts or operates or has power or control:	the distance or area or volume over which something extends
the bony cavity in the skull containing the eyeball	the point or degree to which something extends
the (usually elliptical) path described by one celestial body in its revolution about another
the path of an electron around the nucleus of an atom
a particular environment or walk of life

orbit (verb)	extent (verb)
move in an orbit