As far as I know, you can not make a simple array of synonyms.

But we are replacing synonyms with 'pointers':

synonym guard { type entity; } // old style <*ick!*>
&entity guard; // new style <*cool!*>

Right now it's "pre-beta" so only JCL can tell us if something like this would work:

&entity targetArray[128]; // an array of 128 entity pointers