意思・いし： A really heavy wish, which involves getting someone to do something for you. "When I die it is my wish to donate my organs." "I wish to join this organization."
野心・やしん： ambition - to move up the ranks, to expand one's empire.
望み：のぞみ； an almost-impossible or impossible wish: a faint and idle dream. "Someday I'll marry Tom Cruse." "Someday I'll be President of Moldovia."
願い：ねがい： Same as のぞみ、 but more common. ???
希望・きぼう： A more everyday, smaller, easily possible wish: "I'd like an aisle seat." "I'd like to fly nonstop." More like ”したい” than ”望み”