big,bigger,biggest
colossal,more colossal,most colossal
enormous,more enormous,most enormous
gigantic,more gigantic,most gigantic
hefty,heftier,heftiest
huge,huger,hugest
immense,more immense,most immense
massive,more massive,most massive
sizable,more sizable,most sizable
substantial,more substantial,most substantial
tremendous,more tremendous,most tremendous
vast,vaster,vastest