prime factor Synonyms

essential factor main driver important factor paramount consideration overriding factor dominant factor crucial thing controlling factor driving factor determinant factor major determinant superior factor essential consideration critical component classic factor central reason central feature central factor biological factor big factor basic factor crucial reason core driver main cause key reason defining factor critical factor crucial factor causal factor critical point determining factor divisor major reason most critical factor biggest factor critical item essential element essential component big part core element decisive point central element key element complex