When it comes to finding suitable synonyms for the phrase 'across the board,' there are several options that can be used. Firstly, a simple phrase such as 'universally' can be used to indicate that something applies to everyone or everything without exception. Next, 'broadly speaking' is an excellent phrase that emphasizes the general nature of a statement or decision. Similarly, 'across the spectrum' is another way to describe something that covers the whole range of possibilities or opinions. Other possible synonyms for 'across the board' include 'comprehensively,' 'fully,' 'totally,' 'wholly,' and 'thoroughly,' among others. Regardless of the synonym one chooses, the critical factor is that the message must be conveyed effectively and accurately.