Metal = Gold, Platinum, Copper, Silver
Coffee = Late, Mocha, Espresso, Americano
Dog breed = Terrier, Pug, Chow-chow, Beagle
Math = Sum, Formula, Equation, Numbers
Pets = Cat, Parrot, Hamster, Dog
Swimming = Flippers, Goggles, Swimsuit, Pool
Sport = Hockey, Tennis, Soccer, Swim
Subject = History, Biology, Physics, Math
Royal titles = Baron, Duke, King, Count