The term 'Says It's So' can be expressed in four different ways: asserts, ALLEGES, ASSURE, and AVERS. Asserts is a seven-letter word meaning to state something confidently and emphatically. ALLEGES is also a seven-letter word meaning to make a claim or assertion without proof. ASSURE is a six-letter word meaning to tell someone something with confidence and certainty. AVERS is a five-letter word meaning to declare something as true. All of these words are used to express the idea of saying something is true without providing proof.