Above-board is a word that is synonymous with honest, straightforward, and open. Other synonyms for above-board that are commonly used include genuine, forthright, sincere, transparent, and candid. The term can also be used interchangeably with ethical, moral, and legal. Some other phrases and expressions you can use to describe something that is above-board include 'above suspicion,' 'clean,' 'legit,' and 'true blue.' Regardless of the synonym used, above-board is a concept that implies integrity, honesty, and a genuine desire to do the right thing. It is a term that is often used to describe individuals or organizations that operate with high degrees of transparency, accountability, and honor.