The 'junior' group
These nouns are used to say that people or things are different from each other in age or status. Equal indicates that they are the same in age or status. They usually come after the verb be.
elder equal junior senior superior
I myself am convinced that no empire in world history has been its equal in humanity and benign dedication to the welfare of its subjects.
And in doing so, she met her present husband, Bill Sigmund, who was 20 years her junior.
Everyone is my superior in some way.