The term 'Guaranteed to Succeed' can be represented by three words in a crossword puzzle: SUREFIRE (8 letters), Onice (5 letters), and FAILSAFE (8 letters). SUREFIRE means something that is certain to succeed, while Onice is an anagram of the word 'OCEAN', which symbolizes vastness and success. FAILSAFE is a term used to describe a system or plan that is designed to prevent failure. Together, these three words represent a guarantee of success.