Colossal, gigantesco.
a.Of enormous size; gigantic; huge; as, a colossal statue. Of a size larger than heroic. See Heroic
adj.prodigious, stupendous, large similar term, big similar term
Vogais: ooa
Consoantes: clssl
classical, clausal, cloacal, close call, closely, colical, collocalia, colloquial, classically, coleslaw.