is a specific kind of: adult, grownup.

is a broader term that covers: big cheese, big deal, big enchilada, big fish, big gun, big shot, big wheel, head honcho | celebrity, famous person | behemoth, colossus, giant, heavyweight, titan | elder statesman | eminence grise | Excellency | fixer, influence peddler | heavy hitter | hierarch | high-muck-a-muck, pooh-bah | kingmaker | bigwig, kingpin, top banana | magnifico | figure, name, public figure | nepotist | policy maker | power broker, powerbroker | sacred cow | sirdar | socialite | sun | dignitary, high-up, high muckamuck, panjandrum, very important person, VIP | worthy ... show more.