[1] : WordNet (r) 2.0

america
     n 1: north american republic containing 50 states - 48
          conterminous states in north america plus alaska in
          northwest north america and the hawaiian islands in the
          pacific ocean; achieved independence in 1776 syn: united
          states, united states of america, us, u.s., usa,
           u.s.a.
     2: north and south america syn: the americas
see also:
united states united states of america us u.s. usa u.s.a. 
the americas 

[2] : Moby Thesaurus II by Grady Ward, 1.0

36 moby thesaurus words for "america":
   africa, antipodes, asia, asia major, asia minor, australasia,
   columbia, east, eastern hemisphere, eurasia, europe, far east,
   land of liberty, levant, middle east, near east, new world,
   occident, oceania, old world, orient, us, usa, uncle sugar,
   united states, west, western hemisphere, yankeeland, continent,
   down under, eastland, landmass, stateside, the states,
   the melting pot, the old country

America >> A Words
America, definition of term: America
america_pag1.html

Central America >> C Words
Central America, definition of term: Central America
central+america_pag1.html

Central America >> C Words
Central America, definition of term: Central America
central+america_pag1.html