The term 'higher in rank' can be expressed in four different ways: UPPER (5 letters), SENIOR (6 letters), ABOVE (5 letters), and OVER (4 letters). All of these terms refer to a person or thing that is of a higher rank than another person or thing. For example, a SENIOR manager would be higher in rank than a junior manager. Similarly, a person who is ABOVE another person in a hierarchy would be higher in rank than the other person. Finally, someone who is OVER another person would also be higher in rank than the other person.