Inflectional and derivational morphemes don't attach to words of just any POS category; they are particular.
we can propose the possibility of JJ (adjective) to "broad" and VB or VBP to "govern" (based on the fact the derivational morphemes "en" and "ment" attach to them) even though by themselves they don't have any suffix information that might be indicative of JJ and VB or VBP.