"Wert requisite" is an archaic phrase meaning "were necessary" or "if required." As such, synonyms for this phrase would depend on the context in which it is being used. For example, if referring to a job requirement, synonyms could include "essential," "mandatory," or "prerequisite." If discussing a necessary action, alternatives could include "compulsory," "indispensable," or "obligatory." Regardless of the situation, it is important to choose synonyms that accurately convey the intended meaning and tone of the original phrase.